Background Previous studies have shown a higher risk of birth defects and preterm birth (PTB) in singletons born after blastocyst transfer as compared to singletons born after cleavage-stage transfer. Few…
Background The rising cesarean birth rate has drawn attention to risks associated with repeat cesarean birth. Prevention of adhesions with adhesion barriers has been promoted as a way to decrease…
Introduction Reducing racial/ethnic disparities in rates of preterm birth in the United States has been a major public health challenge. In the United States, non-Hispanic black women face disproportionately greater…
Background The Twin Birth Study randomized women with uncomplicated pregnancies, between 32 0/7 -38 6/7 weeks’ gestation where the first twin was in cephalic presentation, to a policy of either…
Background Women of advanced maternal age (AMA) are at increased risk for cesarean delivery compared to non-AMA women. However, it is unclear whether this association is altered by parity and…
Introduction Meconium aspiration syndrome (MAS) is a leading cause of neonatal morbidity and mortality and of neonatal respiratory distress. An estimated 1000-1500 infants die in the United States each year…
Background High station at specific points in the first stage of labor, such as a floating head on admission, or at 4-cm dilation or when arrest of dilation occurs, is…
Background Mid-trimester transvaginal cervical length assessment can identify women who are at risk of preterm birth and afford opportunities for preterm birth prevention. However, the incidence of a short cervix…
Background Guidelines for management of the second stage have been proposed since the 1800s and were created largely by expert opinion. Current retrospective data are mixed regarding differences in maternal…
Background New labor curves have challenged the traditional understanding of the general pattern of dilation and descent in labor. They also revealed wide variation in the time to advance in…
