{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T21:09:23Z","timestamp":1792012163383,"version":"4.4.0"},"reference-count":0,"publisher":"Cambridge University Press (CUP)","issue":"10","license":[{"start":{"date-parts":[[2025,5,19]],"date-time":"2025-05-19T00:00:00Z","timestamp":1747612800000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":["cambridge.org"],"crossmark-restriction":true},"short-container-title":["Br J Nutr"],"published-print":{"date-parts":[[2025,5,28]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Pregnancy and lactation change women\u2019s body composition (BC), but few longitudinal studies have investigated postpartum BC trajectories. We aimed to investigate maternal and infant predictors of maternal body fat (BF), fat mass (FM), fat-free mass (FFM) and BMI trajectories during lactation. Longitudinal study with 234 Brazilian mother\u2013infant dyads followed at 1\u00b70\u20133\u00b749, 3\u00b75\u20135\u00b799 and 6\u00b70\u20138\u00b75 months postpartum. Maternal BC was estimated using bioelectrical impedance at all follow-up points. Longitudinal mixed\u2013effects models with interaction terms with time (weeks postpartum) were employed. FFM declined significantly over weeks postpartum (<jats:italic>\u03b2<\/jats:italic> = \u22120\u00b702 kg; 95 % CI \u20130\u00b703, \u22120\u00b701). Pre-pregnancy overweight women experienced an increase in all body components (BF: <jats:italic>\u03b2<\/jats:italic> = 4\u00b791 %, 95 % CI 3\u00b779, 6\u00b704; FM: <jats:italic>\u03b2<\/jats:italic> = 6\u00b746 kg, 95 % CI 5\u00b726, 7\u00b767; FFM: <jats:italic>\u03b2<\/jats:italic> = 3\u00b772 kg, 95 % CI 2\u00b780, 4\u00b765) and BMI (<jats:italic>\u03b2<\/jats:italic> = 4\u00b751 kg\/m<jats:sup>2<\/jats:sup>, 95 % CI 3\u00b791, 5\u00b712). Multiparous women showed BMI increases (<jats:italic>\u03b2<\/jats:italic> = 0\u00b776 kg\/m<jats:sup>2<\/jats:sup>, 95 % CI 0\u00b711, 1\u00b741), and those who delivered by caesarean had FFM (<jats:italic>\u03b2<\/jats:italic> = 1\u00b787 kg, 95 % CI 0\u00b767, 3\u00b707) and BMI (<jats:italic>\u03b2<\/jats:italic> = 1\u00b739 kg\/m<jats:sup>2<\/jats:sup>, 95 % CI 0\u00b761, 2\u00b718) increases. Women who birthed girls had reductions in FM (<jats:italic>\u03b2<\/jats:italic> = \u22121\u00b724 kg, 95 % CI \u20132\u00b741, \u22120\u00b707) and FFM (<jats:italic>\u03b2<\/jats:italic> = \u22120\u00b793 kg, 95 % CI \u20131\u00b784, \u22120\u00b701). Interactions occurred between maternal age \u2265 30 years, higher family income, multiparity and infant sex for BC and BMI trajectories. Maternal age, pre-pregnancy BMI, parity, family income, mode of delivery and infant sex predict maternal BC and BMI trajectories.<\/jats:p>","DOI":"10.1017\/s0007114525000935","type":"journal-article","created":{"date-parts":[[2025,5,19]],"date-time":"2025-05-19T06:56:37Z","timestamp":1747637797000},"page":"1350-1362","update-policy":"https:\/\/doi.org\/10.1017\/policypage","source":"Crossref","is-referenced-by-count":2,"title":["Predictors of longitudinal changes in body composition and BMI in Brazilian lactating women during the first 8\u00b75 months postpartum"],"prefix":"10.1017","volume":"133","author":[{"given":"Adriana Divina de Souza","family":"Campos","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gabriela Torres","family":"Silva","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ana Lorena Lima","family":"Ferreira","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amanda Caroline Cunha","family":"Figueiredo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1035-0106","authenticated-orcid":false,"given":"Bruna Celestino","family":"Schneider","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aline Yukari","family":"Kurihayashi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniela de Barros","family":"Mucci","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9483-912X","authenticated-orcid":false,"given":"Jack Ivor","family":"Lewis","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9592-0376","authenticated-orcid":false,"given":"Sophie Hilario","family":"Christensen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christian","family":"M\u00f8lgaard","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kim F.","family":"Michaelsen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lindsay H.","family":"Allen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8603-9077","authenticated-orcid":false,"given":"Gilberto","family":"Kac","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2025,5,19]]},"container-title":["British Journal of Nutrition"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0007114525000935","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,7,8]],"date-time":"2025-07-08T09:53:43Z","timestamp":1751968423000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0007114525000935\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,5,19]]},"references-count":0,"journal-issue":{"issue":"10","published-print":{"date-parts":[[2025,5,28]]}},"alternative-id":["S0007114525000935"],"URL":"https:\/\/doi.org\/10.1017\/s0007114525000935","relation":{},"ISSN":["0007-1145","1475-2662"],"issn-type":[{"value":"0007-1145","type":"print"},{"value":"1475-2662","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,5,19]]},"assertion":[{"value":"\u00a9 The Author(s), 2025. Published by Cambridge University Press on behalf of The Nutrition Society","name":"copyright","label":"Copyright","group":{"name":"copyright_and_licensing","label":"Copyright and Licensing"}}]}}