Gynaecology & Obstetrics General 5bca2ed8 Renal agenesis is associated with: A Hydramnios B Anencephaly C Tracheo-oesophageal fistula D Oligohydramnios High-Yield Explanation Fetal urine is the main contributor of Amniotic fluid beyond 20 weeks therefore. In case of Renal agenesis → decrease/no urine → oligohydramnios.