This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
Renal agenesis is associated with: 
Select and explain. 
A. Hydramnios, B. Anencephaly, C. Tracheo-oesophageal fistula, D. Oligohydramnios
D: Oligohydramnios
Answer: D: Oligohydramnios 
Explanation: Fetal urine is the main contributor of Amniotic fluid beyond 20 weeks therefore. In case of Renal agenesis → decrease/no urine → oligohydramnios.