oligohydramnios
Pronunciation: oh-LIG-oh-hi-DRAM-nee-ohs
Condition of decreased amniotic fluid volume during pregnancy, potentially indicating fetal or maternal complications.
Full Definition
Oligohydramnios refers to an abnormally low volume of amniotic fluid surrounding the fetus, typically defined as an amniotic fluid index (AFI) less than 5 cm or a single deepest pocket less than 2 cm. This condition can result from fetal kidney abnormalities, intrauterine growth restriction, post-term pregnancy, or maternal dehydration. Oligohydramnios increases risks of cord compression, fetal growth restriction, and pulmonary hypoplasia. Management depends on gestational age and underlying cause, ranging from increased maternal hydration to expedited delivery.
Usage
Usage note: Distinguish clearly from polyhydramnios (excess fluid); these are commonly confused terms.
In Context
- "Serial ultrasounds revealed progressive oligohydramnios requiring close fetal surveillance." — Prenatal care documentation
- "Severe oligohydramnios at 34 weeks prompted delivery due to concerns about fetal well-being." — Obstetric consultation note