Gynaecology & Obstetrics Which is the most common congenital abnormality in a baby of a diabetic woman? A Ventricular septal defect B Anencephaly C Meningomyelocele D Sacral agenesis 💡 Explanation Which is the most common congenital abnormality in a baby of a diabetic woman? ✓ Correct Answer: A. Ventricular septal defect