oligohydramnios
Pronunciation: OH-li-go-hahy-DRAM-nee-os
Condition characterized by decreased amniotic fluid volume, associated with fetal abnormalities and pregnancy complications.
Full Definition
Oligohydramnios refers to an abnormally low volume of amniotic fluid surrounding the fetus, typically defined as an amniotic fluid index (AFI) of less than 5 cm or a single deepest pocket of less than 2 cm. This condition can result from fetal renal abnormalities, intrauterine growth restriction, post-term pregnancy, or placental insufficiency. Oligohydramnios increases the risk of fetal compression, leading to pulmonary hypoplasia, limb deformities, and cord compression during labor. The condition requires careful monitoring and may necessitate early delivery depending on severity and underlying cause.
Usage
Usage note: Often confused with polyhydramnios; oligo- means 'few' or 'little'.
In Context
- "Ultrasound examination at 32 weeks revealed severe oligohydramnios with an AFI of 3.2 cm." — Ultrasound report
- "The oligohydramnios was attributed to bilateral renal agenesis confirmed on fetal MRI." — Clinical consultation