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20世紀前半と比較して、医療技術の向上により高齢出産の[[妊婦]]が安全に出産する可能性は向上した。[[不妊治療]]などの[[生殖医療]]技術の向上により40歳以上の妊娠可能性も増大はしているが、20世紀前半でも、20世紀後半でも、21世紀前半でも、妊娠の大部分は自然性交・普通性交による妊娠であり、不妊治療、人工授精、代理出産などの生殖医療技術による妊娠出産は、妊娠出産総数に対する比率としては少数の例外である。高齢になるにつれて妊娠を可能とする条件・能力は低下していくという前提条件は変わっておらず、妊産婦の負担も若年層よりは重くなる。また、遺伝子疾患の発生率は上昇し、特に新生児の[[ダウン症]]の発症率が増加する<ref name="rangman">ラングマン人体発生学第10版 P18　ISBN 978-4-89592-650-8</ref><ref name=Mor2002>{{cite journal|last=Morris|first=JK|author2=Mutton, DE |author3=Alberman, E |title=Revised estimates of the maternal age specific live birth prevalence of Down's syndrome.|journal=Journal of medical screening|year=2002|volume=9|issue=1|pages=2–6|pmid=11943789}}</ref>。母親の出産年齢が高いほど発生頻度は増加し、25歳未満で1/2000、35歳で1/300、40歳で1/100となる<ref name="rangman"/><ref name=Mor2002/><ref name="107th national medical test">第107回 医師国家試験問題解説　P296 メディック・メディア 2013年5月8日発売 ISBN 978-4896324716</ref>。
 
== 日本母体の年齢階層別の出産生数と出産生総数に対する割合比率の推移 ==
 
{|class="wikitable" style="text-align:right;"
{| class="wikitable" style="text-align:right"
|+'''日本の出産総数と母体の年齢層別の出産数と出産総数に対する割合の推移'''
|+'''1925年～2017年の出生総数と母体の年齢階層別の出生数（人）と出生総数に対する比率（％）の推移'''
|-style="text-align:center;"
!rowspan="2"|年度!!rowspan="2"|出産総数<br />（人）!!colspan="11"|出産した母体の年齢層別の出産数（人）!!colspan="11"|出産総数に対する年齢層別の出産数の割合（％）
|-style="text-align:center;"
!rowspan="2"|年度!!colspan="16"|出生総数と母体の年齢階層別の出生数（人）!!colspan="6"|出生総数に対する母体の年齢階層別の比率（％）
!15-19||20-24||25-29||30-34||35-39||40-44||45-49||15-29||30-49||35-49||40-49||15-19||20-24||25-29||30-34||35-39||40-44||45-49||15-29||30-49||35-49||40-49
|-
!出生総数<br /><ref name="ja-estat-birthbymotherageclass1925-2004">[http://www.stat.go.jp/data/chouki/02.htm 総務省＞統計局＞日本の長期統計系列＞目次＞第2章＞人口・世帯＞2-29-a 母の年齢5歳階級別出生数]</ref><ref name="ja-mhlw-population-moving-stat2017">[https://www.mhlw.go.jp/toukei/saikin/hw/jinkou/geppo/nengai17/dl/h3-4.pdf 厚生労働省＞統計情報・白書＞各種統計調査＞厚生労働統計一覧＞人口動態調査＞結果の概要＞平成29年（2017）人口動態統計月報年計（概数）の概況＞出生数の年次推移,母の年齢（5歳階級）別]</ref><br /><ref name="ja-mhlw-population-moving-stat2016">[https://www.mhlw.go.jp/toukei/saikin/hw/jinkou/kakutei16/dl/08_h4.pdf 厚生労働省＞統計情報・白書＞各種統計調査＞厚生労働統計一覧＞人口動態調査＞結果の概要＞平成28年（2016）人口動態統計（確定数）の概況＞第5表 年齢（５歳階級）･ 出生順位別にみた合計特殊出生率（内訳）]</ref><ref name="ja-mhlw-population-moving-stat2015">[http://www.mhlw.go.jp/toukei/saikin/hw/jinkou/kakutei15/dl/08_h4.pdf ホーム＞統計情報・白書＞各種統計調査＞厚生労働統計一覧＞人口動態調査＞結果の概要＞平成27年（2015）人口動態統計（確定数）の概況＞第３表　母の年齢（５歳階級）・出生順位別にみた出生数]</ref><br /><ref name="ja-mhlw-population-moving-stat2013">[http://www.mhlw.go.jp/toukei/saikin/hw/jinkou/geppo/nengai13/dl/h3_4.pdf ホーム＞統計情報・白書＞各種統計調査＞厚生労働統計一覧＞人口動態調査＞結果の概要＞平成25年（2013）人口動態統計（確定数）の概況＞第３表　母の年齢（５歳階級）・出生順位別にみた出生数]</ref><ref name="ja-mhlw-population-moving-stat2010">[http://www.mhlw.go.jp/toukei/saikin/hw/jinkou/geppo/nengai10/toukei03.html ホーム＞統計情報・白書＞各種統計調査＞厚生労働統計一覧＞人口動態調査＞結果の概要＞平成22年（2010）人口動態統計（確定数）の概況＞第３表　母の年齢（５歳階級）・出生順位別にみた出生数]</ref><br /><ref name="ja-mhlw-population-moving-stat2007">[http://www.mhlw.go.jp/toukei/saikin/hw/jinkou/geppo/nengai07/toukei3.html ホーム＞統計情報・白書＞各種統計調査＞厚生労働統計一覧＞人口動態調査＞結果の概要＞平成19年（2007）人口動態統計（確定数）の概況＞第３表　母の年齢（５歳階級）・出生順位別にみた出生数]</ref><ref name="ja-mhlw-population-moving-stat2004">[http://www.mhlw.go.jp/toukei/saikin/hw/jinkou/geppo/nengai04/toukei3.html ホーム＞統計情報・白書＞各種統計調査＞厚生労働統計一覧＞人口動態調査＞結果の概要＞平成16年（2004）人口動態統計（確定数）の概況＞第３表　母の年齢（５歳階級）・出生順位別にみた出生数]</ref>!!14歳<br />以下<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!15歳～<br />19歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!20歳～<br />24歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!25歳～<br />29歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!30歳～<br />34歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!35歳～<br />39歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!40歳～<br />44歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!45歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!50歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!19歳<br />以下<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!20歳～<br />29歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!29歳<br />以下<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!30歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!35歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!40歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!19歳<br />以下<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!20歳～<br />29歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!29歳<br />以下<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!30歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!35歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!40歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />
|1925||2,086,091||136,021||569,470||547,792||404,508||289,745||119,216||19,338||1,253,283||832,807||428,299||138,554||6.5||27.3||26.3||19.4||13.9||5.7||0.93||60.1||39.9||20.5||6.6
|-
|19301925||2,085005,101408||112474||119,021273||548542,863089||578530,245632||436392,334550||279280,111076||114,131396||1614,397389||1,2393,129648||845119,973747||4091,072,639721||1301,528192,468||5.4805,059||26.3412,509||27.7||20.9||13.4132,433||5.597||053.7949||59.446||40.614||1920.657||6.360
|-
|19401930||2,115004,867805||53,080206||44897,763399||668522,323769||502562,396831||313425,190273||114270,924920||15110,191069||111,170,166580||9453,701509||44397,305605||1301,085,115600||2.51,183,205||21.2821,351||31.6396,078||23.7125,158||144.887||554.415||059.7202||5540.397||4419.7||21.076||6.124
|-
|19471937||2,678108,792112||126||61,223803||615518,658692||826647,601334||645450,329563||398304,985962||117109,806998||11,899501||12,503572||61,482929||1,174166,019026||5281,227,690955||129879,705596||2.3429,033||23.0124,071||302.994||2455.131||1458.9||4.4||0.44||56.125||4341.872||1920.735||45.889
|-
|19501938||21,337867,507068||152||5652,365892||624443,797848||794571,241538||496402,240803||278,781722||81104,953093||410,524242||12,475,403706||86153,498044||3651,258015,386||861,068,477430||2.4798,566||26.7395,763||34.0117,041||21.2||11.984||354.538||057.1923||6342.177||3621.920||15.6||3.727
|-
|19551939||1,730846,692874||25,219239||46946,027253||691403,349807||372577,175604||138421,158374||33280,055698||1103,706847||110,185,595140||5452,094763||17246,919492||34981,761411||1.5,027,903||27.1818,822||39.9397,448||21.5116,750||82.052||153.914||055.1066||6844.534||3121.552||10.0||26.032
|-
|19601940||12,606059,041021||19,739298||44745,097068||745431,253818||300655,684488||78493,104398||14306,217795||942111,816||1,21211,089234||3933,947079||9345,263366||151,159087,306||1.2,132,672||27.8926,322||46.4432,924||18.7126,129||4.9||02.920||052.0681||7555.501||2444.599||521.803||06.913
|-
|19651941||12,823216,697617||17,71929||51331,645663||854423,399749||355703,269642||72564,355658||9332,828952||480141,391||115,385,763232||4373,932294||8231,663692||101,308127,391||1.0,159,083||28.21,057,527||46.8492,869||19.5159,917||41.043||050.586||052.0329||7647.071||22.24.0||4.5||07.621
|-
|19701942||12,934176,239183||20,17765||51345,172214||951460,246417||358663,375815||80539,581694||9324,860204||548128,230||111,484,595798||4492,364746||9045,989279||101,408124,232||1.0,169,511||26.51,006,672||49.2466,978||18.5142,774||4.2||0.508||051.0366||7653.874||2346.226||421.746||06.556
|-
|19751943||12,901211,440242||15,99969||47942,041338||1,014452,624188||320660,060951||62561,663276||8345,727383||319133,942||112,509,664656||3912,769437||7142,709407||91,046113,139||0.81,155,546||25.21,055,694||53.4494,418||16.8149,035||31.392||050.534||052.0226||7947.474||2022.636||3.8||06.574
|-
|19801944||1,576,889ND||14,590ND||296,854ND||810,204ND||388,935ND||59,127ND||6,911ND||258ND||1,121,648ND||455,231ND||66,296ND||7,169ND||0.9ND||18.8ND||51.4ND||24.7ND||3.7ND||0.4ND||0.02ND||71.1ND||28.9ND||4.2||0.5ND
|-
|19851945||1,431,577ND||17,877ND||247,341ND||682,885ND||381,466ND||93,501ND||8,224ND||245ND||948,103ND||483,436ND||101,970ND||8,469ND||1.2ND||17.3ND||47.7ND||26.6ND||6.5ND||0.6ND||0.02ND||66.2ND||33.8ND||7.1||0.6ND
|-
|19901946||1,221,585ND||17,496ND||191,859ND||550,994ND||356,026ND||92,377ND||12,587ND||224ND||760,349ND||461,214ND||105,188ND||12,811ND||1.4ND||15.7ND||45.1ND||29.1ND||7.6ND||1.0ND||0.02ND||62.2ND||37.8ND||8.6||1.0ND
|-
|19951947||12,187678,064792||16,11251||19361,514172||492615,714658||371826,773601||100645,053329||12398,472985||414117,806||7029,340969||4841,712930||11261,939223||121,886442,259||1.4,503,482||16.31,174,019||41.5528,690||31.3129,705||82.429||153.184||056.0313||5943.283||4019.874||94.5||1.184
|-
|20001948||12,190681,547624||19,77252||16173,361077||470687,833904||396817,901910||126585,409590||14383,848087||402124,173||6518,966688||5381,560044||14173,659129||151,505,250814||1.7,578,943||13.61,102,582||39.5516,992||33.3133,905||102.673||156.215||058.0388||5441.812||4519.228||11.9||14.399
|-
|20011949||12,170696,662638||20,96543||15767,077344||450695,013067||399881,808559||127584,336040||15353,047930||402107,769||6286,055358||542450||67,593387||1421,576,785626||151,449644,013||1.8,052,547||13.4468,507||38.4114,577||342.250||1058.947||160.397||039.03||5317.637||46.3||12.2||14.325
|-
|20021950||12,153337,855507||21,40149||15256,493316||425624,817797||406794,482241||131496,040240||16278,200781||40681,953||5994,711213||554,128311||14756,646365||161,606419,038||1.9,475,403||13.2861,498||36.9365,258||35.286,477||112.441||160.471||063.0412||5236.086||4815.063||123.8||1.470
|-
|20031951||12,123137,610689||19,58116||14245,068878||395558,975590||408753,585049||139465,489318||17242,478350||42168,957||5573,624010||565,973199||15745,388894||171,311,899639||1.7,357,533||12.6779,834||35.2314,516||36.472,166||122.415||161.636||063.0450||4936.6||50.448||14.071||13.638
|-
|20041952||12,110005,721162||18,59121||13637,486944||370524,220033||415734,903697||150440,222095||18208,790603||49956,778||5252,297633||585,414199||16937,511965||191,289258,730||1.7,296,695||12.3708,308||33.3268,213||37.4||13.559,610||1.789||062.0477||4764.367||5235.732||1513.338||12.797
|-
|20051953||1,062868,530040||16,57332||12831,135764||339495,328590||404705,700767||153409,440333||19177,750114||598||48446,036046||5782,488186||173,788193||2031,348796||1.6,201,357||12.1,233,153||31.9634,872||38.1225,539||14.448,425||1.970||064.0631||4566.601||5433.499||1612.407||12.959
|-
|20061954||1,092769,674580||15,97414||13027,230497||335474,771131||417686,776777||170387,775925||21152,608635||53138,578||4811,975886||610,690129||19227,914511||221,139160,908||1.5,188,419||11.9581,153||30.7193,228||38.240,593||151.655||265.060||067.0516||44.1||5532.984||1710.792||2.029
|-
|20071955||1,089730,818692||15,2508||12625,180211||324469,041027||412691,611349||186372,568175||24138,553158||609||46533,471055||6241,341572||211,730134||25,162219||1.4,160,376||11.61,185,595||29.7545,094||37.9172,919||17.134,761||21.346||067.0605||4268.750||5731.350||199.499||2.301
|-
|20081956||1,091665,156278||15,465||12422,691263||317456,753115||404687,771009||200346,328702||27123,522563||61828,167||4571,909345||633,23995||22822,468278||281,140143,124||1.4,165,402||11.4499,872||29.1153,170||37.129,607||181.434||268.564||069.0698||4230.002||589.0||20.9||21.678
|-
|20091957||1,070566,035713||14,687||11619,808298||307427,765073||389673,793964||209317,706735||30105,566091||70422,207||4391,260237||630,76994||24019,976312||311,101,270037||1.4,120,349||10.9446,364||28.8128,629||36.423,538||191.623||270.928||071.0751||4128.149||588.921||22.5||21.950
|-
|20101958||1,071653,304469||13,54611||11018,956339||306456,910322||384734,385436||220323,101356||3499,609769||79220,055||4311,412068||639,887108||25518,502350||351,190,401758||1.3,209,108||10.4444,356||28.6121,000||35.921,231||201.511||372.202||073.0713||4026.387||59.7||23.832||31.328
|-
|20111959||1,050626,698088||13,31714||10419,053156||300453,350432||373733,452704||221311,245289||3790,435374||84317,046||417,720981||632,97588||25919,523170||381,187,278136||1.3,206,306||9.9419,778||28.6108,489||35.518,115||21.1||3.618||073.0801||3974.818||6025.282||246.767||31.611
|-
|20121960||1,037606,231041||12,7705||9519,805734||292447,464097||367745,715253||225300,480684||4278,031104||96014,217||401,039864||636,18678||26819,471739||421,192,991350||1.2,212,089||9.2393,947||28.293,263||35.515,159||211.723||474.124||075.0947||3824.753||615.381||250.9||4.194
|-
|20131961||1,029589,816372||12,9647||9119,250155||282429,794303||365757,404023||229299,741582||4670,546849||111612,670||387,008730||642,80746||27719,403162||471,186,662326||1.3,205,488||8.9383,877||27.584,295||35.513,446||221.321||474.564||075.1185||3724.615||625.430||26.9||40.685
|-
|-style="text-align:left;"
|1962||1,618,616||9||18,666||436,927||780,651||303,976||66,468||11,228||663||25||18,675||1,217,578||1,236,253||382,360||78,384||11,916||1.15||75.22||76.38||23.62||4.84||0.74
|colspan="24"|
|-
*1925～2013年の出生数→国立社会保障・人口問題研究所>人口統計資料集>2012年版>４．出生・家族計画<ref name="ageclass-birthnumber-1925-2013" />
|1963||1,659,521||10||18,204||440,367||801,236||321,554||67,132||10,461||541||14||18,214||1,241,603||1,259,817||399,702||78,148||11,016||1.10||74.82||75.91||24.09||4.71||0.66
*2010～2013年の出生数→厚生労働省>平成23年人口動態統計月報年計<ref name="ageclass-birthnumber-2013" />
|-
*15歳未満は15～19歳に含む、50歳以上は45～49歳に含む。
|1964||1,716,761||15||16,777||478,708||809,597||332,437||68,502||10,230||469||19||16,792||1,288,305||1,305,097||411,657||79,220||10,718||0.98||75.04||76.02||23.98||4.61||0.62
*1945年～1972年は沖縄県は含まない。
|}-
|1965||1,823,697||7||17,712||513,645||854,399||355,269||72,355||9,828||462||18||17,719||1,368,044||1,385,763||437,932||82,663||10,308||0.97||75.01||75.99||24.01||4.53||0.57
 
|-
 
|1966||1,360,974||16||20,014||394,059||617,827||258,489||61,114||8,958||471||20||20,030||1,011,886||1,031,916||329,052||70,563||9,449||1.47||74.35||75.82||24.18||5.18||0.69
== 日本の年齢層別人口に対する出産数の割合の推移 ==
|-
{|class="wikitable" style="text-align:right;"
|1967||1,935,647||5||23,599||491,079||948,848||384,315||77,871||9,489||421||14||23,604||1,439,927||1,463,531||472,110||87,795||9,924||1.22||74.39||75.61||24.39||4.54||0.51
|+'''日本の年齢層別人口と母体の年齢層別の出産数と出産年齢層別人口に対する出産数の推割の合移'''
|-
|-style="text-align:center;"
|1968||1,871,839||21||21,842||471,466||921,153||367,412||79,687||9,728||498||10||21,863||1,392,619||1,414,482||457,335||89,923||10,236||1.17||74.40||75.57||24.43||4.80||0.55
!rowspan="2"|年度!!colspan="10"|女性の出産年総人口と齢層別人口（千人）!!colspan="10"|女性の出産年齢層別人口に対する出産数の割合（％）
|-
|1969||1,889,815||19||20,733||465,455||955,034||357,441||80,728||9,757||493||13||20,752||1,420,489||1,441,241||448,432||90,991||10,263||1.10||75.17||76.26||23.73||4.81||0.54
|-
|1970||1,934,239||12||20,165||513,172||951,246||358,375||80,581||9,860||523||25||20,177||1,464,418||1,484,595||449,364||90,989||10,408||1.04||75.71||76.75||23.23||4.70||0.54
|-
|1971||2,000,973||8||19,714||598,505||917,924||372,647||81,404||10,074||498||15||19,722||1,516,429||1,536,151||464,638||91,991||10,587||0.99||75.78||76.77||23.22||4.60||0.53
|-
|1972||2,038,682||13||20,000||624,317||925,049||379,605||79,121||10,146||423||4||20,013||1,549,366||1,569,379||469,299||89,694||10,573||0.98||76.00||76.98||23.02||4.40||0.52
|-
|1973||2,091,983||9||19,770||602,137||991,442||389,112||78,817||10,238||448||4||19,779||1,593,579||1,613,358||478,619||89,507||10,690||0.95||76.18||77.12||22.88||4.28||0.51
|-
|1974||2,029,989||7||18,537||549,390||1,011,405||370,456||70,213||9,570||399||2||18,544||1,560,795||1,579,339||450,640||80,184||9,971||0.91||76.89||77.80||22.20||3.95||0.49
|-
|1975||1,901,440||9||15,990||479,041||1,014,624||320,060||62,663||8,727||312||7||15,999||1,493,665||1,509,664||391,769||71,709||9,046||0.84||78.55||79.40||20.60||3.77||0.48
|-style="text-align:center;"
!rowspan="2"|年度!!colspan="16"|出生総数と母体の年齢階層別の出生数（人）!!colspan="6"|出生総数に対する母体の年齢階層別の比率（％）
!総 数!!15-19!!20-24!!25-29!!30-34!!35-39!!40-44!!45-49!!35以上!!40以上!!総 数!!15-19!!20-24!!25-29!!30-34!!35-39!!40-44!!45-49!!35以上!!40以上
|-
!出生総数<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!14歳<br />以下<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!15歳～<br />19歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!20歳～<br />24歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!25歳～<br />29歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!30歳～<br />34歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!35歳～<br />39歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!40歳～<br />44歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!45歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!50歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!19歳<br />以下<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!20歳～<br />29歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!29歳<br />以下<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!30歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!35歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!40歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!19歳<br />以下<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!20歳～<br />29歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!29歳<br />以下<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!30歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!35歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!40歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />
|1925||14,111||2,897||2,486||2,137||1,796||1,681||1,598||1,516||4,795||3,114||14.78||4.70||22.91||25.63||22.52||17.24||7.46||1.276||8.93||4.45
|-
|19301976||151,179832,617||3,22112||214,716154||2425,355286||21,036,039805||1287,728291||160,599553||18,521169||4338||2||14,848166||31,120462,091||13.741,476,257||3.48356,353||20.2169,062||24.558,509||210.4077||1679.1578||780.1455||119.07845||83.4577||40.1846
|-
|19401977||171,577755,100||3,69315||313,047137||2375,817445||2991,441532||2305,163578||161,858175||17,558877||5,579335||32||13,416152||12.041,366,977||1.44,380,129||14.73374,967||23.7269,389||208,214||0.5875||1477.4889||678.1964||021.97536||73.95||30.8147
|-
|19471978||201,194708,643||4,11915||313,699562||3341,081013||2941,767255||2343,552830||261,081243||17,895427||6,528288||3,9764||13.27,577||1.49,282,268||16.641,295,845||26.83412,792||2368,962||7,719||0.3279||1575.6305||575.6684||024.62816||84.1004||30.2645
|-
|19501979||211,287642,580||48||13,250657||3316,890509||3870,363962||2372,842782||261,672599||6,798||257||2||13,284665||1,986187,471||61,942201,136||4441,270438||10.9868,656||1.337,057||160.0683||2372.6229||1773.4612||1026.4387||34.5918||0.228||5.26||2.0343
|-
|19551980||231,289576,889||414||14,284576||4296,207854||3810,829204||3388,320935||259,796127||26,621911||257||1||214,232590||71,649107,058||41,121,853648||7.43455,231||0.5966,296||11.157,169||180.0693||1170.21||471.9413||128.2687||0.076||24.2620||0.7245
|-
|19601981||251,290529,455||4,63116||415,193439||4281,115127||3766,771659||3401,275957||256,745840||27,560184||8,580228||1||515,305455||6.351,047,786||0.431,063,241||10.66466,210||18.1164,253||7,413||1.9701||268.3851||069.52||030.03748||14.0920||0.2948
|-
|19651982||271,943515,392||515||16,374694||4276,572168||4745,207229||4404,110||365,751131||37,232772||2,697267||9,6801||516,929709||6.531,021,397||0.331,038,106||11.23477,281||20.3173,171||8.64,040||1.9310||067.3040||068.01850||031.8550||4.83||0.1753
|-
|19701983||291,559508,687||4,49219||518,347242||4274,572911||4727,190006||4402,085440||377,674704||38,199109||10,958246||61||18,873261||6.541,001,917||0.451,020,178||9.60488,500||20.8186,060||8.55,356||1.9721||066.2741||067.01762||032.8338||5.70||0.1555
|-
|19751984||301,427489,780||3,90918||419,509180||5264,370205||4715,622754||4393,211182||488,100558||38,706605||12239||1||19,017198||7979,806959||6.25999,157||0.41490,585||10.6297,403||18.898,845||61.9229||165.4978||067.2107||032.00993||06.6054||0.1259
|-
|19801985||301,631431,577||4,05023||317,883854||4247,498341||5682,352885||4381,609466||493,180501||48,059224||12244||1||17,848877||8930,239226||5.15948,103||0.36483,436||7.64101,970||18.018,469||71.2725||164.2898||066.1723||033.00677||07.5212||0.0959
|-
|19851986||301,860382,946||4,38120||417,036687||3237,876159||4652,497221||5371,341306||496,584731||47,145527||14260||0||17,070707||8889,729380||4.64907,087||0.41475,824||6.13104,518||17.627,787||81.4828||164.7531||065.1859||034.00641||07.7256||0.1056
|-
|19901987||311,447346,658||4,89328||417,340530||3225,999098||3634,869440||4364,486838||595,317776||48,543682||14229||1||17,346558||9859,860538||3.88877,096||0.36469,526||4.42104,688||13.788,912||91.2030||263.0683||065.2413||034.00587||07.7377||0.1366
|-
|19951988||311,041314,006||4,17518||417,857316||4214,339393||4611,015998||3364,879186||494,482967||510,294820||13279||2||17,655334||9826,776391||3.82843,725||0.39470,254||3.98106,068||11.36,101||91.2632||262.5889||064.2821||035.00879||08.8307||0.1384
|-
|20001989||291,315246,802||27||317,659171||4202,120369||4566,831095||4356,346728||492,024240||311,881||4,454256||120||17,359198||8768,335464||4.06785,662||0.54461,105||3.92104,377||9.7512,137||91.1338||361.1463||063.3801||036.00998||18.1537||0.1897
|-
|20011990||291,047221,585||3,58318||417,004478||4191,780859||4550,611994||3356,967026||392,851377||412,251587||12224||0||17,069496||8742,102853||4.03760,349||0.59461,214||3.92105,188||9.4112,811||81.6743||360.2181||062.3924||037.00976||18.1861||01.1905
|-
|20021991||281,800223,245||3,50722||318,910421||4201,645601||4541,699036||4357,099653||391,876612||412,064619||12252||0||18,039443||7742,940637||4.01761,080||0.61462,136||3.90104,483||9.1712,871||81.6551||360.2071||062.4222||037.01078||18.2354||01.2105
|-
|20031992||281,587208,989||22||318,408372||3204,835141||4524,477269||4357,804170||492,203209||312,907481||299||2||318,953394||12728,063410||7746,860804||3.93462,161||0.57104,991||3.7012,782||81.8452||860.5125||361.3277||038.4523||08.01168||1.30||0.2306
|-
|20041993||281,372188,282||3,29513||317,770439||4197,294974||4510,859933||4357,303087||392,933286||312,918177||12348||0||17,154452||7708,851907||3.91726,359||0.56461,898||3.62104,811||8.6212,525||81.5647||359.4966||061.4813||038.01387||18.3982||01.2505
|-
|20051994||271,238,986328||322||17,204073||3204,607386||4525,095940||4377,837401||4100,347570||412,027481||431||3,869||1217,243095||7730,896326||3.80747,421||0.52490,886||3.55113,485||8.2912,915||81.3738||358.5398||060.4936||039.01564||19.4216||01.2604
|-
|20061995||271,781187,064||3,12837||316,563075||3193,941514||4492,757714||4371,592773||3100,963053||312,837472||12414||0||16,392112||7686,800228||3.93702,340||0.51484,712||3.66112,939||8.5212,886||81.7836||357.7281||059.5517||040.01483||19.5651||01.2809
|-
|20071996||271,622206,555||3,06219||315,521602||3190,828520||4504,615575||4377,663274||4105,079630||312,854526||12397||0||15,596621||7695,933095||3.95710,716||0.50495,827||3.58118,553||8.4712,923||81.9429||457.0061||058.6090||041.01609||19.6883||01.3207
|-
|20081997||271,421191,665||336||16,003598||3182,455479||3496,738477||4374,430819||4107,750993||412,170829||407||3,875||1216,795634||8678,045956||3.98695,590||0.51496,051||3.61121,232||8.5013,239||91.1440||456.2298||058.6637||041.01663||110.7917||01.3511
|-
|1998||1,203,147||34||17,467||177,195||492,692||388,294||113,728||13,255||459||3||17,501||669,887||687,388||515,739||127,445||13,717||1.45||55.68||57.13||42.87||10.59||1.14
|-
|1999||1,177,669||48||18,205||166,136||476,115||386,639||116,443||13,629||426||6||18,253||642,251||660,504||517,143||130,504||14,061||1.55||54.54||56.09||43.91||11.08||1.19
|-
|2000||1,190,547||43||19,729||161,361||470,833||396,901||126,409||14,848||396||6||19,772||632,194||651,966||538,560||141,659||15,250||1.66||53.10||54.76||45.24||11.90||1.28
|-
|2001||1,170,662||45||20,920||157,077||450,013||399,808||127,336||15,047||398||4||20,965||607,090||628,055||542,593||142,785||15,449||1.79||51.86||53.65||46.35||12.20||1.32
|-
|2002||1,153,855||52||21,349||152,493||425,817||406,482||131,040||16,200||396||10||21,401||578,310||599,711||554,128||147,646||16,606||1.85||50.12||51.97||48.02||12.80||1.44
|-
|2003||1,123,610||49||19,532||142,068||395,975||408,585||139,489||17,478||402||19||19,581||538,043||557,624||565,973||157,388||17,899||1.74||47.89||49.63||50.37||14.01||1.59
|-
|2004||1,110,721||45||18,546||136,486||370,220||415,903||150,222||18,790||483||16||18,591||506,706||525,297||585,414||169,511||19,289||1.67||45.62||47.29||52.71||15.26||1.74
|-
|2005||1,062,530||42||16,531||128,135||339,328||404,700||153,440||19,750||564||34||16,573||467,463||484,036||578,488||173,788||20,348||1.56||44.00||45.56||54.44||16.36||1.92
|-
|2006||1,092,674||41||15,933||130,230||335,771||417,776||170,775||21,608||522||9||15,974||466,001||481,975||610,690||192,914||22,139||1.46||42.65||44.11||55.89||17.66||2.03
|-
|2007||1,089,818||39||15,211||126,180||324,041||412,611||186,568||24,553||590||19||15,250||450,221||465,471||624,341||211,730||25,162||1.40||41.31||42.71||57.29||19.43||2.31
|-
|2008||1,091,156||38||15,427||124,691||317,753||404,771||200,328||27,522||594||24||15,465||442,444||457,909||633,239||228,468||28,140||1.42||40.55||41.97||58.03||20.94||2.58
|-
|2009||1,070,035||67||14,620||116,808||307,765||389,793||209,706||30,566||684||20||14,687||424,573||439,260||630,769||240,976||31,270||1.37||39.68||41.05||58.95||22.52||2.92
|-
|2010||1,071,304||51||13,495||110,956||306,910||384,385||220,101||34,609||773||19||13,546||417,866||431,412||639,887||255,502||35,401||1.26||39.01||40.27||59.73||23.85||3.30
|-
|2011||1,050,806||44||13,274||104,059||300,384||373,490||221,272||37,437||802||41||13,318||404,443||417,761||633,042||259,552||38,280||1.27||38.49||39.76||60.24||24.70||3.64
|-
|2012||1,037,231||59||12,711||95,805||292,464||367,715||225,480||42,031||928||32||12,770||388,269||401,039||636,186||268,471||42,991||1.23||37.43||38.66||61.34||25.88||4.14
|-
|2013||1,029,816||51||12,913||91,250||282,794||365,404||229,741||46,546||1,069||47||12,964||374,044||387,008||642,807||277,403||47,662||1.26||36.32||37.58||62.42||26.94||4.63
|-
|2014||1,003,539||43||12,968||86,590||267,847||359,323||225,889||49,606||1,214||58||13,011||354,437||367,448||636,090||276,767||50,878||1.30||35.32||36.62||63.38||27.58||5.07
|-
|2015||1,005,677||39||11,890||84,461||262,256||364,870||228,293||52,558||1,256||52||11,929||346,717||358,646||647,029||282,159||53,866||1.19||34.48||35.66||64.34||28.06||5.36
|-
|2016||978,678||46||11,049||82,169||250,639||354,911||223,287||53,474||1,350||51||11,095||332,808||343,903||633,073||278,162||54,875||1.13||34.01||35.14||64.69||28.42||5.61
|-
|2017||946,060||－||9,898||79,265||240,933||345,417||216,937||52,099||1,511||－||9,898||320,198||330,096||615,964||270,547||53,610||1.05||33.85||34.89||65.11||28.60||5.67
|-style="text-align:center;"
!rowspan="2"|年度!!出生総数<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!14歳<br />以下<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!15歳～<br />19歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!20歳～<br />24歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!25歳～<br />29歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!30歳～<br />34歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!35歳～<br />39歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!40歳～<br />44歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!45歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!50歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!19歳<br />以下<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!20歳～<br />29歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!29歳<br />以下<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!30歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!35歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!40歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!19歳<br />以下<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!20歳～<br />29歳<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!29歳<br />以下<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!30歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!35歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />!!40歳<br />以上<br /><ref name="ja-estat-birthbymotherageclass1925-2004" /><ref name="ja-mhlw-population-moving-stat2017" /><br /><ref name="ja-mhlw-population-moving-stat2016" /><ref name="ja-mhlw-population-moving-stat2015" /><br /><ref name="ja-mhlw-population-moving-stat2013" /><ref name="ja-mhlw-population-moving-stat2010" /><br /><ref name="ja-mhlw-population-moving-stat2007" /><ref name="ja-mhlw-population-moving-stat2004" />
|-
!colspan="16"|出生総数と母体の年齢階層別の出生数（人）!!colspan="6"|出生総数に対する母体の年齢階層別の比率（％）
|2009||27,178||2,966||3,363||3,670||4,230||4,797||4,258||3,894||12,949||8,152||3.94||0.50||3.47||8.39||9.21||4.37||0.72||0.018||1.86||0.38
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|style="text-align:left;" colspan="23"|説明
|2010||27,196||2,966||3,197||3,636||4,148||4,862||4,363||4,024||13,249||8,387||3.94||0.46||3.47||8.44||9.27||4.53||0.79||0.020||1.93||0.42
*1944年～1946年は戦争中・終戦直後の混乱期で正確な統計データは存在しない。
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*1947年～1972年（1945年6月23日～1972年5月14日）は日本の統治下でなかったので沖縄県は含まない。
|colspan="21"|
*2017年度は暫定の概数値である、14歳以下の出産は15歳～19歳に含み、50歳以上の出産は45歳～49歳に含む。
*1925～2013年の出生数→国立社会保障・人口問題研究所>人口統計資料集>2012年版>4．出生・家族計画<ref name="ageclass-birthnumber-1925-2013" />
*出生総数に対する年齢階層別の比率（％）は小数第3位で四捨五入して小数第2位までの精度で表記する。
*2010～2013年の出生数→厚生労働省>平成23年人口動態統計月報年計<ref name="ageclass-birthnumber-2013" />
*1925～2010年の年齢層別女性人口→総務省統計局>人口推計>長期時系列データ>我が国の推計人口(大正9年～平成12年)>年齢(5歳階級及び3区分) - 男女別人口(各年10月1日現在)<ref name="population-1920-2000" />
*2001～2010年の年齢層別女性人口→総務省統計局>人口推計>長期時系列データ>長期時系列データ(平成12年～22年)>年齢(5歳階級及び3区分) - 男女別人口(各年10月1日現在)<ref name="population-2000-2010" />
*1925～2010年の年齢層別女性人口→総務省統計局>人口推計>長期時系列データ>我が国の推計人口(大正9年～平成12年)>年齢(5歳階級及び3区分) - 男女別人口(各年10月1日現在)<ref name="population-1920-2000">[http://www.e-stat.go.jp/SG1/estat/List.do?bid=000000090004&cycode=0 総務省統計局>人口推計>長期時系列データ>我が国の推計人口(大正9年～平成12年)>年齢(5歳階級及び3区分) - 男女別人口(各年10月1日現在)]</ref>
*2001～2010年の年齢層別女性人口→総務省統計局>人口推計>長期時系列データ>長期時系列データ(平成12年～22年)>年齢(5歳階級及び3区分) - 男女別人口(各年10月1日現在)<ref name="population-2000-2010">[http://www.e-stat.go.jp/SG1/estat/List.do?bid=000001039703&cycode=0 総務省統計局>人口推計>長期時系列データ>長期時系列データ(平成12年～22年)>年齢(5歳階級及び3区分) - 男女別人口(各年10月1日現在)]</ref>
*15歳未満は15～19歳に含む、50歳以上は45～49歳に含む。
*1945年～1972年は沖縄県は含まない。
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