Oligohydramnios refers to a situation where the amniotic fluid volume is less than expected for gestational age. Often these fetuses have <500 mL of amniotic fluid. When there is almost no amniotic fluid present, this is termed anhydramnios. E... This leaflet is to help you understand what Oligohydramnios is, what tests you need and the implication of being diagnosed with Oligohydramnios for you, your baby and your family. 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. Oligohydramnios is a condition characterized by low amniotic fluid levels, requiring careful evaluation and management for optimal maternal and fetal outcomes.