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This prospective follow-up study of a randomized clinical trial evaluates whether antenatal corticosteroids administered to birthing parents at risk of late preterm delivery were associated with adverse neurodevelopmental effects on their offspring.

This randomized clinical trial assesses the effect of cervical pessary placement on preterm birth and fetal mortality among pregnant individuals with a cervical length of 20 mm or less.

This cohort study evaluates the association of SARS-CoV-2 infection with serious maternal morbidity or mortality related to hypertensive disorders of pregnancy, postpartum hemorrhage, or infection other than SARS-CoV-2.

This open-label randomized trial compares the effects of preventive negative pressure wound therapy vs standard wound dressing on surgical site infection among obese women after cesarean delivery.

This randomized clinical trial compares the effects of immediate vs delayed pushing on spontaneous vaginal delivery and maternal and neonatal morbidities among nulliparous women at or beyond 37 weeks’ gestation admitted for spontaneous or induced labor.

This randomized clinical trial tests the hypothesis that room air is noninferior to oxygen in improving fetal metabolic status during intrauterine resuscitation.

This study compares the cumulative probability of live birth among women with and without in vitro fertilization insurance coverage at a university-affiliated reproductive medicine center.

This randomized clinical trial assesses whether high-dose vitamin D supplementation during the third trimester of women at high risk of having children with asthma reduces asthma or recurrent wheeze in their offspring.