Oligohydramnios
Condition in which amniotic fluid volume is severely reduced (typically, the amount is less than 500 ml at term) and fluid is highly concentrated
May result in prolonged, dysfunctional labor usually beginning before term
Places the fetus at risk for various conditions, such as renal anomalies, pulmonary hypoplasia, wrinkled, leathery skin, increased skeletal deformities, and fetal hypoxia
Causes
Exact cause unknown
Associated with any condition that prevents the fetus from producing urine or blocks it from going into the amniotic sac
Contributing factors: uteroplacental insufficiency, premature rupture of membranes before labor onset, gestational hypertension, maternal diabetes, intrauterine growth restriction, postterm pregnancy, fetal renal agenesis, polycystic kidneys, urinary tract obstructions
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