{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,18]],"date-time":"2026-10-18T23:40:48Z","timestamp":1792366848752,"version":"4.4.0"},"reference-count":20,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,10,18]],"date-time":"2026-10-18T00:00:00Z","timestamp":1792281600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,10,18]],"date-time":"2026-10-18T00:00:00Z","timestamp":1792281600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100002322","name":"Coordena\u00e7\u00e3o de Aperfei\u00e7oamento de Pessoal de N\u00edvel Superior","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100002322","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Paediatric Perinatal Epid"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Adolescent pregnancy is linked to adverse perinatal outcomes, yet distinctions between early (10\u201314\u2009years) and late (15\u201319\u2009years) adolescence and the impact of prenatal care adequacy remain unclear. We compared perinatal outcomes across maternal\u2010age groups and explored the contribution of prenatal\u2010care inadequacy to the association between maternal age and preterm birth.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We conducted a hospital\u2010based cross\u2010sectional study using SINASC data from a tertiary referral centre in Brazil. Live births to mothers aged 10\u201324\u2009years from 2015 to 2020 were classified as early adolescence (10\u201314\u2009years), late adolescence (15\u201319\u2009years), or 20\u201324\u2009years (reference). Preterm birth (&lt;\u200937\u2009weeks), preterm\u2010birth severity, a birth\u2010weight\u2010percentile proxy, and prenatal\u2010care adequacy were assessed. Adjusted risk ratios (RRs) were estimated using modified Poisson regression with robust variance and multiple imputation (20 datasets). An exploratory g\u2010computation analysis evaluated the contribution of inadequate prenatal care (&lt;\u20097 visits) to the maternal\u2010age\u2013preterm\u2010birth association.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Early and late adolescents had higher risks of preterm birth (RR 1.33 and 1.19) and inadequate prenatal care (RR 1.13 for both) compared to the reference group. Early adolescents also had increased risk of low birth\u2010weight percentile (RR 1.47). Inadequate prenatal care accounted for approximately 10% of the association between adolescent age and preterm birth.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Adolescent pregnancy, especially early adolescence, is associated with increased preterm birth and prenatal care inadequacy. While prenatal care partially explains this risk, substantial direct associations persist, highlighting the need for comprehensive interventions beyond prenatal visit frequency.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/ppe.70210","type":"journal-article","created":{"date-parts":[[2026,10,18]],"date-time":"2026-10-18T23:21:22Z","timestamp":1792365682000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Adolescent Pregnancy and Perinatal Outcomes: A Hospital\u2010Based Cross\u2010Sectional Study"],"prefix":"10.1111","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0433-3692","authenticated-orcid":false,"given":"Ana Clara Pereira","family":"Simpl\u00edcio","sequence":"first","affiliation":[{"name":"Department of Medicine Federal University of Rio Grande Do Norte  Natal Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4116-7005","authenticated-orcid":false,"given":"Anna Luiza Henriques","family":"Fonseca","sequence":"additional","affiliation":[{"name":"Department of Medicine Federal University of Rio Grande Do Norte  Natal Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8692-5706","authenticated-orcid":false,"given":"Juliana Dantas de Ara\u00fajo Santos","family":"Camargo","sequence":"additional","affiliation":[{"name":"Postgraduate Program in Health Science Federal University of Rio Grande Do Norte  Natal Brazil"},{"name":"Janu\u00e1rio Cicco Maternity School Federal University of Rio Grande Do Norte  Natal Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7085-8788","authenticated-orcid":false,"given":"Amaxsell Thiago Barros","family":"de Souza","sequence":"additional","affiliation":[{"name":"Postgraduate Program in Science Applied to Women's Health Federal University of Rio Grande Do Norte  Natal Brazil"},{"name":"N\u00facleo de Investigaci\u00f3n en Ciencias de la Salud Universidad Adventista de Chile  Chill\u00e1n Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-3381-8081","authenticated-orcid":false,"given":"Gabriela Santana Oliveira","family":"de Freitas","sequence":"additional","affiliation":[{"name":"Department of Medicine University of Fortaleza  Fortaleza Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2193-4403","authenticated-orcid":false,"given":"Rafael Ant\u00f4nio Santana Oliveira","family":"de Freitas","sequence":"additional","affiliation":[{"name":"Department of Gynecology and Obstetrics University of S\u00e3o Paulo  S\u00e3o Paulo Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0184-2061","authenticated-orcid":false,"given":"Ricardo Ney","family":"Cobucci","sequence":"additional","affiliation":[{"name":"Janu\u00e1rio Cicco Maternity School Federal University of Rio Grande Do Norte  Natal Brazil"},{"name":"Postgraduate Program in Science Applied to Women's Health Federal University of Rio Grande Do Norte  Natal Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5165-1976","authenticated-orcid":false,"given":"S\u00e1vio Ferreira","family":"Camargo","sequence":"additional","affiliation":[{"name":"Postgraduate Program in Health Science Federal University of Rio Grande Do Norte  Natal Brazil"},{"name":"Janu\u00e1rio Cicco Maternity School Federal University of Rio Grande Do Norte  Natal Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3907-9601","authenticated-orcid":false,"given":"Ana Karla Monteiro Santana Oliveira","family":"de Freitas","sequence":"additional","affiliation":[{"name":"Janu\u00e1rio Cicco Maternity School Federal University of Rio Grande Do Norte  Natal Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,10,18]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/1471-0528.12630"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/S2214\u2010109X(13)70179\u20107"},{"key":"e_1_2_11_4_1","volume-title":"Adolescent Pregnancy [Internet]. 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