anhydramnios
Pronunciation: an-hahy-DRAM-nee-ohs
Complete absence of amniotic fluid around the fetus, representing the most severe form of oligohydramnios.
Full Definition
Anhydramnios is the complete absence or virtual absence of amniotic fluid in the amniotic sac during pregnancy. This represents the most severe end of the spectrum of oligohydramnios conditions. It can result from severe fetal kidney abnormalities, prolonged rupture of membranes, or severe placental insufficiency. The condition poses significant risks to fetal development, including pulmonary hypoplasia, growth restriction, and limb deformities. Diagnosis is typically made through ultrasound examination showing no measurable pockets of amniotic fluid.
Usage
Usage note: Distinct from oligohydramnios in representing complete absence rather than just decreased fluid.
In Context
- "Ultrasound findings were consistent with anhydramnios secondary to bilateral renal agenesis." — prenatal diagnosis report
- "The pregnancy was complicated by anhydramnios following prolonged membrane rupture." — high-risk pregnancy notes