Oligohydramnios is seen in -
Renal agenesis
Oesophageal atresia
Exomphalos
Neural tube defect
Ans. is 'a' i.e. Renal agenesis Renal agenesis prevents urine formation which leads to oligohydramnios.Oligohydramnios is condition where amniotic fluid is deficient in amount to the extent of 100ml or entirely absentAetiologyRenal agenesis*Amnion nodosum*IUGR*Post maturity*Obst. of urinary tract (post urethral Valve*)
Hydramnios and Oligo Hydramnios