Background: Amniotic fluid is an important part of pregnancy which plays a vital role in the normal growth of the fetus and, promotes muscular-skeletal development and allows for easier fetal movement, also its very crucial for the survival of the fetus. It also create hydrostatic wedge which helps in dilatation of cervix during labour. Women with oligohydramnios are more likely to have abnormal or non-reactive FHR tracings, increased incidence of fetal distress, and thus an increased incidence of caesarean sections. Oligohydramnios is also the leading indication for labor induction. Aims: (1) To know the proportion of the oligohydramnios. (2) To study the impact of amniotic fluid index on mode of delivery. (3) To study the impact of amniotic fluid index on perinatal outcome. Study design: Prospective Descriptive hospital based study. Material & methods: The study was conducted in department of obstetrics and Gynaecology, at Tertiary care center. Statistical Analysis: Data was analyzed using SPSS Ver 23. Frequencies, Descriptive, chi square test were done. Result: Out of total 384 patient, 80 patient had oligohydramnios (AFI <5 cm). oligohydramnios associated with high rate of induction of labour (86.3%), meconium stained liquor (70.1%) and fetal distress (40%), that lead to high rate of LSCS (63.8%) and NICU admission (30%) and high neonatal complication like birth asphyxia, RDS, Jaundice, MAS, Septicemia which was 23.75%, 16.3%, 25%, 6.3%, 6.3% respectively. Conclusion: 1. Determination of AFI is a valuable screening test for predicting fetal distress & neonatal outcome. 2. From study, it is suggested that antepartum evaluation of amniotic fluid volume may prove useful in reducing perinatal mortality and morbidity and improving pregnancy outcome.

Keywords: Oligohydramnios; Amniotic fluid volume; Induction of labour; Perinatal Outcome.