Introduction: Oligohydramnios has adverse effect on perinatal outcome and is associated with incidence of increased rate of labor induction, non-reassuring fetal heart pattern, stillbirth, meconium aspiration syndrome (MAS) and neonatal death. . Criteria for oligohydramnios are Amniotic fluid volume < 500 cc at 32-36 weeks of gestation,Single deepest vertical pocket of < 2 cm, Amniotic fluid index (AFI) < 8cms at 34 weeks of gestation. Material and Methods: The study was level II study i.e. prospective - observational study comprising of one hundred fifty pregnancies divided into two groups; one group had seventy-five pregnancies with oligohydramnios and the control group with seventyfive pregnancies without oligohydramnios confirmed by ultrasound examination. Maternal and perinatal outcome was evaluated at or beyond 34 weeks of gestation. Results: Majority of cases were between the age group of 20 to 30 years in both study and control group. Oligohydramnios was commonly found in primigravida – 65% in study group and 48% in control group (p=0.0476). Most common cause of oligohydramnios was idiopathic i.e. 51% followed by pregnancy induced hypertension (PIH) in 21% cases. It was observed that 45% of cases in study group required induction of labor by cervipime gel ( 0.5 mg given by intracervical route) as opposed to control group in which 29% of cases required induction (p=0.043). Non-reactive non stress test (NST) at the time of admission in labor room or at the time of labor was more in the study group (36%) than in control group (15%) [p=0.0427]. It was also observed that meconium stained liquor (thin +thick) was more common in study group than control group i.e. 43% v/s 23% respectively (p=0.0419).

Keywords: Oligohydramnios; Perinatal Morbidity; Amniotic Fluid Index(AFI)