{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,4]],"date-time":"2026-09-04T18:13:49Z","timestamp":1788545629302,"version":"build-2803163510"},"reference-count":56,"publisher":"SAGE Publications","license":[{"start":{"date-parts":[[2026,9,2]],"date-time":"2026-09-02T00:00:00Z","timestamp":1788307200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,9,2]],"date-time":"2026-09-02T00:00:00Z","timestamp":1788307200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Nutr Health"],"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Preconception health influences pregnancy outcomes, with poor nutrition and health-related behaviors linked to anemia, preeclampsia, and fetal growth restriction. Despite increasing attention to these adverse outcomes, evidence on preconception nutritional and behavioral interventions remains limited, fragmented, and inconsistently synthesized.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objectives<\/jats:title>\n                    <jats:p>To synthesize evidence on the role of preconception nutritional supplementation and behavioral interventions in supporting maternal and neonatal health outcomes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We conducted a systematic review and meta-analysis following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines with the protocol registered in PROSPERO (#CRD42024592645). Studies published from the inception to October 1, 2024, were identified through six databases. A total of 24 studies met the eligibility criteria, which included randomized, non-randomized, and controlled before\u2013after studies involving women aged 18\u201345 planning pregnancy or interconception period. Preconception interventions included nutritional supplementation (e.g., folic acid, calcium, multiple micronutrients) and behavioral\/lifestyle strategies (e.g., counseling, diet, physical activity). Findings were analyzed separately by intervention type and outcome. Two reviewers independently screened studies and extracted data. Meta-analyses were conducted using RevMan software. Risk of bias was assessed using Cochrane RoB 2 and ROBINS-I, and certainty of evidence was rated using Grading of Recommendations, Assessment, Development, and Evaluation (GRADE).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The included studies suggested that lifestyle interventions reduced the risk of gestational diabetes mellitus (GDM) with Risk Ratio (RR): 0.76; 95% Confidence Interval (CI): 0.60\u20130.95), lowered gestational weight gain (GWG) with Mean Deviation (MD): \u22123.88\u2005kg; 95% CI: \u221210.53 to \u22124.75), and improved GWG adequacy (RR: 1.62; 95% CI: 1.17\u20132.25). Nutritional supplementation were associated with reduced GDM risk (RR: 0.55; 95% CI: 0.43\u20130.71), increased birth weight by 72.26\u2005g (95% CI: 47.40\u201397.12; I\n                      <jats:sup>2<\/jats:sup>\n                      \u2009=\u200996%), reduced preeclampsia risk with calcium (RR: 0.71; 95% CI: 0.54\u20130.92), and lowered neurodevelopmental disorder risk with folic acid\/multivitamin use (RR: 0.14; 95% CI: 0.11\u20130.18). No pooled or synergistic association across intervention categories was estimated.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Outcome-specific evidence suggests that preconception nutritional and behavioral interventions are associated with improvements in selected maternal and neonatal outcomes. However, heterogeneity and limitations of underlying studies constrain causal inference, underscoring the need for rigorous longitudinal and integrated intervention research.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/02601060261483862","type":"journal-article","created":{"date-parts":[[2026,9,2]],"date-time":"2026-09-02T16:49:15Z","timestamp":1788367755000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Preconception nutritional supplementation and behavioral interventions and their association with maternal and neonatal health: A systematic review and meta-analysis"],"prefix":"10.1177","author":[{"given":"Salima","family":"Meherali","sequence":"first","affiliation":[{"name":"University of Alberta"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3005-2296","authenticated-orcid":false,"given":"Yared Asmare","family":"Aynalem","sequence":"additional","affiliation":[{"name":"University of Alberta"},{"name":"Debre Berhan University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-6818-9907","authenticated-orcid":false,"given":"Saba","family":"Nisa","sequence":"additional","affiliation":[{"name":"University of Alberta"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Megan","family":"Kennedy","sequence":"additional","affiliation":[{"name":"University of Alberta Libraries"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zohra S.","family":"Lassi","sequence":"additional","affiliation":[{"name":"The University of Adelaide"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,9,2]]},"reference":[{"key":"e_1_3_2_2_1","doi-asserted-by":"publisher","DOI":"10.1136\/emermed-2020-209567"},{"key":"e_1_3_2_3_1","doi-asserted-by":"publisher","DOI":"10.1093\/humupd\/dmp025"},{"key":"e_1_3_2_4_1","volume-title":"Cochrane Handbook for Systematic Reviews of Interventions","author":"Chandler J","year":"2019","unstructured":"Chandler J, Cumpston M, Li T, et al. 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