{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,23]],"date-time":"2026-03-23T10:34:12Z","timestamp":1774262052905,"version":"3.50.1"},"reference-count":31,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2013,9,5]],"date-time":"2013-09-05T00:00:00Z","timestamp":1378339200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J of Obstet and Gynaecol"],"published-print":{"date-parts":[[2014,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aim<\/jats:title><jats:p>The paper examines recent time trends, explores potentially influential background factors and discusses prevention strategies of pregnancy among girls under 15 years of age in <jats:styled-content style=\"fixed-case\">J<\/jats:styled-content>apan.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Using Japanese government data, we first analyzed time trends of early adolescence (&lt;15 years of age) abortion, live birth and child sexual abuse from 2003 to 2010. Second, we analyzed ecological correlations of early adolescent pregnancy (abortion, live birth and stillbirth) with pregnancy in other age groups, child sexual abuse, and indicators of juvenile victimization and juvenile delinquency, using prefectural data.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>We found that rates of both abortion and live birth in early adolescents have increased since 2005 (annual percent change 5.3% and 2.3%, respectively), despite declining rates in older age groups. The abortion ratio in early adolescence remained the highest among all age groups in <jats:styled-content style=\"fixed-case\">J<\/jats:styled-content>apan. The early adolescent pregnancy rate showed significant correlation with the rates of juvenile victimization of welfare crimes (obscenity, alcohol drinking, smoking and drug use) (<jats:styled-content style=\"fixed-case\">S<\/jats:styled-content>pearman's rank correlation coefficient [rs]\u2009=\u20090.42, <jats:italic><jats:styled-content style=\"fixed-case\">P<\/jats:styled-content><\/jats:italic>\u2009=\u20090.00) and juvenile delinquency among junior high school students (12\u201314 years of age) (rs\u2009=\u20090.69, <jats:italic><jats:styled-content style=\"fixed-case\">P<\/jats:styled-content><\/jats:italic>\u2009=\u20090.00).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>The observed rise in rates of abortion, live birth and child sexual abuse among early adolescents along with strong ecological correlations of their pregnancy rate with juvenile victimization and delinquency indicators suggests that epidemiological investigation and public health programs at the individual and community levels are needed to address the complex social roots of these trends and to produce effective improvements in early adolescent reproductive health.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jog.12138","type":"journal-article","created":{"date-parts":[[2013,9,5]],"date-time":"2013-09-05T08:32:57Z","timestamp":1378369977000},"page":"125-132","source":"Crossref","is-referenced-by-count":11,"title":["Recent pregnancy trends among early adolescent girls in <scp>J<\/scp>apan"],"prefix":"10.1111","volume":"40","author":[{"given":"Sachiko","family":"Baba","sequence":"first","affiliation":[{"name":"Center for International Relations Osaka University Graduate School of Medicine  Osaka Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aya","family":"Goto","sequence":"additional","affiliation":[{"name":"Department of Public Health Fukushima Medical University School of Medicine  Fukushima Japan"},{"name":"Takemi Program in International Health Harvard School of Public Health  Boston Massachusetts USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael R.","family":"Reich","sequence":"additional","affiliation":[{"name":"Department of Global Health and Population Harvard School of Public Health  Boston Massachusetts USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2013,9,5]]},"reference":[{"key":"e_1_2_6_2_1","unstructured":"Ministry of Internal Affairs and Communications.Portal site of official statistics of Japan (e\u2010Stat). 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