![]() ![]() Depends on gestational age at diagnosis, cause and gestational age at delivery.Uteroplacental insufficiency: cesarean section or vaginal delivery depending on gestational age, fetal size and degree of fetal compromise as defined by Doppler and or cardiotocography.Rupture of the membranes: expectant management and vaginal delivery if cephalic presentation.Fetal urinary tract abnormalities: standard obstetric care and delivery.In uteroplacental insufficiency assessment of fetal growth and Doppler in the umbilical artery, ductus venosus and middle cerebral artery will help decide the best time for delivery. ![]() Therapeutic amnioinfusion is not useful.In cases of rupture of the membranes assessment of lung growth may be useful in predicting pulmonary hypoplasia. Ultrasound scans every 1-3 weeks to monitor fetal condition and assess amniotic fluid volume.Invasive testing for karyotyping should be undertaken if there are relevant fetal abnormalities.In cases of unexplained oligohydramnios, amnioinfusion may be useful in allowing detailed examination of the fetus and in some cases to demonstrate that the cause was rupture of membranes.Uteroplacental insufficiency: Fetal growth restriction with Doppler evidence of high impedance to flow in the uterine and / or umbilical arteries and redistribution in the fetal circulation.Preterm prelabor rupture of the membranes: normal fetal growth, anatomy and fetal Doppler, with maternal history of vaginal loss of clear or blood stained amniotic fluid.Urinary tract abnormalities: bilateral renal agenesis, multicystic or polycystic kidneys and urethral obstruction.There are essentially three major causes of oligohydramnios at The vertical measurement of the deepest pocket of amniotic fluid free of fetal parts is 1 in 100 pregnancies at ![]()
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