gynecology and obstetrics
Preterm Labor
Introduction
 34 weeks—see Corticosteroids ) and possibly magnesium sulfate (if gestational age is Preterm labor may be triggered by Prelabor Rupture of Membranes (PROM) None Intraamniotic Infection (chorioamnionitis) Another ascending uterine infection (commonly due to group B streptococci) Multifetal Pregnancy None Fetal or placental abnormalities Uterine abnormalities Pyelonephritis Some sexually transmitted infections (STIs) A cause may not be evident. Prior preterm delivery and Cervical Insufficiency increase the risk. Premature labor can increase risk of Intracranial Hemorrhage in Neonates in neonates; intraventricular hemorrhage may result in neurodevelopmental disability (eg, 