title: [Cervical preinduction and oligoamnios].
abstract: BACKGROUND
  Twelve percent of women with 41 weeks of gestation and more had oligoamnios. Physiopathological mechanism of this disease still is under discussion.
  
  
  OBJECTIVE
  To evaluate perinatal result of patients with more than 41 weeks of gestation oligoamnios-preinduced.
  
  
  METHODS
  Analytic-observational and retrospective cohorts study. Patients with more than 41 weeks of gestation, oligoamnios-preinduced, were included. All patients received dinoprostone and had a Bishop score lower than seven. Amniotic fluid index of five or lower suggests diagnosis of oligoamnios. Preinduction indication, characteristics of intrapartum fetal monitoring, umbilical artery pH, Apgar score, neonatal weight, and admission in a neonatal unit were the variables analyzed.
  
  
  RESULTS
  Among the 96 patients, 28 (29.2%) constituted the exposed cohort and 68 (70.8%) the non-exposed one. Both groups were homogeneous in maternal age, parity and initial Bishop score. There weren't significant differences for way of delivery, cesarean section indications, meconium-stained amniotic fluid and umbilical cord pathology. Frequency of bradycardia was significantly higher in oligoamnios group (14.3 vs 1.5%), as well as Apgar score at first (mean of 8.86 vs 8.38) and fifth birth minute (mean of 9.89 vs 9.69). Fetal weight was significantly lower (3,298 vs 3,546 g) in oligoamnios group. Admission in neonatal unit was higher in the non-exposed cohort (1.47%).
  
  
  CONCLUSIONS
  Newborns of patients with oligoamnios had a better Apgar score, lower fetal weight and higher frequency of intrapartum bradycardia (without neonatal damage). A further study may offer new conclusions.
authors.affiliation: Sección de patologá obstétrica, Hospital Universitario Miguel Servet, Zaragoza, España. jmartinezme@salud.aragon.es
authors.forename: Jorge
authors.initials: J
authors.lastname: Martínez Medel
authors.forename: José Manuel
authors.initials: JM
authors.lastname: Campillos Maza
authors.forename: Carlos
authors.initials: C
authors.lastname: Lapresta Moros
authors.forename: Adela
authors.initials: A
authors.lastname: Villacampa Pueyo
authors.forename: Javier
authors.initials: J
authors.lastname: Tobajas Homs
mesh_terms: D000328:Adult; D015331:Cohort Studies; D005260:Female; D006801:Humans; D016104:Oligohydramnios / Q000175:diagnosis / Q000628:therapy; D011247:Pregnancy; D011256:Pregnancy Outcome; D012189:Retrospective Studies