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Size and multiplicity of placental lakes on 20-week fetal anatomy ultrasound and obstetrical outcomes.

Our objective was to determine if placental lake presence or size are associated with adverse pregnancy outcomes. This was a retrospective cohort of patients who had fetal anatomy ultrasounds at 18-22 weeks and delivered between 2018 and 2022. Placental lakes were classified as small (>2.0-3.9 cm) or large (>4 cm). Multiple gestations, placenta previas, and placenta accretas were excluded. Outcomes included low birthweight, cesarean delivery, primary cesarean for non-reassuring fetal heart tracing, fetal growth restriction, preterm birth, and severe preeclampsia. A total of 1052 patients were included; 294 had placental lakes (204 small, 90 large). No differences in pregnancy outcomes were observed. RÉSUMÉ: Notre objectif était de déterminer si la présence d'un lac placentaire et sa taille sont associées à des issues de grossesse défavorables. Il s'agit d'une étude de cohorte rétrospective portant sur des patientes ayant eu une échographie morphologique entre 18 et 22 semaines d'aménorrhée et ayant accouché dans la période de 2018 à 2022. Les lacs placentaires ont été classés comme petits (>2,0-3,9 cm) ou grands (>4 cm). Les cas de grossesse multiple, de placenta prævia et de placenta accreta ont été exclus. Les critères de jugement étaient le faible poids à la naissance, la césarienne, la césarienne primaire pour un tracé cardiaque fœtal non rassurant, le retard de croissance intra-utérin, l'accouchement prématuré et la pré-éclampsie sévère. Au total, 1052 patientes ont été incluses; 294 avaient un lac placentaire (204 petits, 90 grands). Aucune différence n'a été observée dans les issues de grossesse.

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