Which of the following is a cause of oligohydramnios: (AIIMS Nov 2013)
|A||Congenital heart disease|
|C||Gestational diabetes mellitus|
|D||Posterior urethral valve in the fetus|
Posterior urethral valve in the fetus
a. Fetal causes of polyhydramnios include anencephaly, presumably due to impaired swallowing on a neurologic basis, and gastrointestinal tract obstruction (esophageal or duodenal atresia).
b. Maternal diabetes is also associated with a high incidence of polyhydramnios.
c. Genitourinary tract anomalies that diminish fetal urine output, such as bilateral renal agenesis or posterior urethral valves, lead to oligohydramnios.
d. Other causes of oligohydramnios include IUGR and ruptured membranes.
e. Oligohydramnios is defined as the volume of the amniotic fluid (A F) being < 300 ml during the 3rd trimester of pregnancy.