Which of the following is a cause of polyhydramnios?

• A. Fetal G.I. anomaly
• B. Oligohydramnios
• C. Placental abruption
• D. Umbilical cord prolapse

Answer: (A)

Polyhydramnios occurs when there is too much amniotic fluid, often because the fetus isn’t able to remove it effectively. A fetal GI anomaly can block or alter the ability to swallow amniotic fluid. When swallowing is impaired, the fluid isn’t taken back into the fetus, so it accumulates in the amniotic sac, leading to excess fluid.

Other choices don’t fit this mechanism: oligohydramnios is a deficiency of fluid, not an excess; placental abruption and umbilical cord prolapse are complications that affect placental or cord function and acute obstetric risk, not a direct cause of too much amniotic fluid.