Oligohydramnios is associated with which condition?

• A. Renal anomalies
• B. Gastrointestinal anomalies
• C. Polyhydramnios
• D. Placental abruption

Answer: (A)

Oligohydramnios means there is too little amniotic fluid, and after mid-pregnancy the fluid mostly comes from fetal urine. When the fetal kidneys are abnormal or not functioning—such as renal agenesis or severe obstructive uropathy—urine production drops dramatically, leading to reduced amniotic fluid. That makes fetal renal anomalies the most classic association with oligohydramnios.

Gastrointestinal problems, by contrast, often relate to polyhydramnios because impaired swallowing or absorption increases fluid. Placental issues can contribute late, but the strongest link for oligohydramnios is fetal renal anomalies.