Know the causes, symptoms, and treatments for oligohydramnios in pregnancy. Learn about diagnosis, risks, and complications of low amniotic fluid levels. Management of Oligohydramnios Definition Oligohydramnios refers to amniotic fluid volume (liquor volume (LV)) that is less than expected for gestational age. It occurs in 0.5% - 1% of pregnancies, and in 5% of pregnancies at term. The diagnosis is usually made subjectively. Oligohydramnios is defined as a single deepest vertical pool (DVP) of 2 cm or less. It may also be described using the amniotic fluid index (AFI) of 50mm or less. Background Oligohydramnios is caused by a reduction in ... Oligohydramnios is amniotic fluid volume that is less than expected for gestational age; it is associated with maternal and fetal complications. Diagnosis is by ultrasonographic measurement of amniotic fluid volume. Management involves close fetal monitoring and serial ultrasonographic assessments. Learn about Oligohydramnios : causes, symptoms, diagnosis, and treatment options at Apollo Hospitals.