Gynaecology & Obstetrics Most commonly detected genitourinary abnormality seen in first trimester ultrasound is ? A Megacystis B Hydronephrosis C Cystic Kidney D Renal Agenesis 💡 Explanation Most commonly detected genitourinary abnormality seen in first trimester ultrasound is ? ✓ Correct Answer: A. Megacystis