Mireku M. O. auteur aut IRD Boivin M. J. auteur aut IRD Zoumenou R. auteur aut IRD Garrison A. auteur aut IRD Cot Michel auteur aut IRD Alao J. auteur aut IRD Fievet Nadine auteur aut IRD Massougbodji A. auteur aut IRD Bodeau-Livinec F. auteur aut IRD text journalArticle eng text/pdf born digital access Anemia in pregnancy, defined by a hemoglobin level (Hb) of less than 110 g/L, contributes to infant mortality and morbidity in sub-Saharan Africa. Maternal Hb changes physiologically and pathologically during pregnancy. However, the impact of these changes on long-term child neurocognitive function is unknown. This study therefore investigates the association between Hb at specific antenatal care visits and prenatal Hb trajectories during pregnancy and long-term child neurocognitive function. We analyzed data from a prospective cohort study that included 6-year-old singleton children born to women enrolled before 29 weeks of gestation into an antimalarial drug clinical trial. Hemoglobin level was analyzed from venous blood collected at least twice during pregnancy and at delivery. We used group-based trajectory modeling to identify distinct prenatal Hb trajectories. In total, 478 children (75.1% of eligible children) had assessment of cognitive and motor functions at 6 years of age. Three distinct Hb trajectories were identified: persistently anemic (Hb <110 g/L throughout the second and third trimesters), anemic to nonanemic (Hb <110 g/L at second trimester with increasing Hb toward the third trimester to Hb >= 110 g/L), and persistently nonanemic (Hb >= 110 g/L throughout the second and third trimesters). Children of women in the persistently anemic and anemic-to-nonanemic groups had significantly lower neurocognitive scores than children of women in the persistently nonanemic group (beta =-6.8, 95% CI:-11.7 to-1.8; and beta =-6.3, 95% CI:-10.4 to-2.2, respectively). The study shows that maintaining an elevation of Hb at or above 110 g/L from the second to third trimester of pregnancy may be associated with optimal long-term child neurocognitive function. specialized BENIN AFRIQUE SUBSAHARIENNE 050 112 3 692-698 2025 0002-9637 https://www.documentation.ird.fr/hor/fdi:010093468 10.4269/ajtmh.24-0643 0002-9637 [F B010093468] https://www.documentation.ird.fr/hor/fdi:010093468 https://www.documentation.ird.fr/intranet/publi/2025-06/010093468.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2025-06-11 2025-11-04 fdi:010093468 fre