oligohydramnios
Pronunciation: ol-ih-go-hi-DRAM-nee-os
Abnormally low amount of amniotic fluid surrounding the fetus during pregnancy.
Full Definition
A condition characterized by decreased amniotic fluid volume, typically defined as an amniotic fluid index (AFI) of less than 5 cm or a single deepest pocket of less than 2 cm on ultrasound. Oligohydramnios can result from various causes including fetal renal abnormalities, intrauterine growth restriction, post-term pregnancy, or premature rupture of membranes. The condition may lead to complications such as cord compression during labor, fetal growth problems, and pulmonary hypoplasia. Management depends on gestational age and severity, ranging from increased monitoring to delivery.
Usage
Usage note: Often abbreviated as 'oligo' in clinical discussion. Severity should be specified when known.
In Context
- "Severe oligohydramnios was noted on ultrasound, prompting delivery at 34 weeks." — High-risk pregnancy note
- "The oligohydramnios appears related to intrauterine growth restriction." — Maternal-fetal medicine consultation