title: Pregnancy outcomes after antepartum diagnosis of oligohydramnios at or beyond 34 weeks' gestation.
abstract: OBJECTIVE
  Our purpose was to assess whether antepartum oligohydramnios is associated with adverse perinatal outcomes.
  
  
  METHODS
  Women delivered between July 1, 1991, and September 30, 1996, who underwent ultrasonography at >/=34 weeks' gestation were analyzed. Oligohydramnios was defined as an amniotic fluid index </=50 mm. Perinatal outcomes in pregnancies with oligohydramnios were compared with those with an amniotic fluid index of >50 mm.
  
  
  RESULTS
  In our analysis of 6423 pregnancies, 147 (2.3%) were complicated by oligohydramnios. This complication was associated with increased labor induction (42% vs 18%; P <.001), stillbirth (1. 4% vs 0.3%; P <.03), nonreassuring fetal heart rate (48% vs 39%; P <. 03), admission to the neonatal intensive care nursery (7% vs 2%; P <. 001), meconium aspiration syndrome (1% vs 0.1%; P <.001), and neonatal death (5% vs 0.3%; P <.001).
  
  
  CONCLUSIONS
  Antepartum oligohydramnios is associated with increased perinatal morbidity and mortality.
authors.affiliation: Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center at Dallas, 75235-9032, USA.
authors.forename: B M
authors.initials: BM
authors.lastname: Casey
authors.forename: D D
authors.initials: DD
authors.lastname: McIntire
authors.forename: S L
authors.initials: SL
authors.lastname: Bloom
authors.forename: M J
authors.initials: MJ
authors.lastname: Lucas
authors.forename: R
authors.initials: R
authors.lastname: Santos
authors.forename: D M
authors.initials: DM
authors.lastname: Twickler
authors.forename: R M
authors.initials: RM
authors.lastname: Ramus
authors.forename: K J
authors.initials: KJ
authors.lastname: Leveno
mesh_terms: D000328:Adult; D001145:Arrhythmias, Cardiac / Q000196:embryology / Q000209:etiology; D002585:Cesarean Section; D005260:Female; D005313:Fetal Death / Q000209:etiology; D006340:Heart Rate, Fetal; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D015931:Intensive Care, Neonatal; D007751:Labor, Induced; D008471:Meconium Aspiration Syndrome / Q000209:etiology; D016104:Oligohydramnios / Q000150:complications / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D011247:Pregnancy; D011256:Pregnancy Outcome; D013997:Time Factors; D016216:Ultrasonography, Prenatal