Oligohydramnios is one of the complications of pregnancy and contribute significant to maternal and perinatal morbidity and mortality. Oligohydramnios defined as an extremely rare condition where the liquor amnii is deficient in amount to the extent of less than 200ml at term or AF volume less than expected Gestational age. 15-25% of cases of oligohydramnios are associated with the foetal anomalies. It is an abnormal condition occurs during pregnancy resulting from lack of amniotic fluid surrounds the body in uterus, amniotic value less than 500ml at 32-36 weeks of gestation. Amniotic fluid volume is depends on gestational age, therefore the best definition of oligohydramnios is AFI less than 5 percentile or AFI less than 5cms. It is typically diagnosed by ultra sound examination by amniotic fluid index. Sonographically, it is defined when the maximum vertical pocket of liquor is less than 2cms or when amniotic fluid index (AFI) is less than 5cms. Absence of any measurable pocket of amniotic fluid is defined as anhydramnios. AFI between 5 and 8 is termed as borderline AFI or borderline Oligohydramnios. In normal pregnancy amniotic fluid volume is usually increases to about 1 litre by 36 weeks and decreases thereafter only 100 to 200 ml or less in post term. Diminished fluid volume is termed as oligohydramnios.