Gynaecology & Obstetrics Aneuploidy, is the most common genetic abnormality, accounting for up to 50% of clinical miscarriages. All are true about aneuploidy, EXCEPT: A 30-40% of trisomy 21, fetus die between 12 weeks and 40 weeks B 50-60% of trisomy 18, fetus die between 12 weeks and 40 weeks C Occurrence of triploidy has no relation with the progression of mother's age D In previous pregnancy with trisomy 21 due to non disjunction, the risk in future pregnancy is .75% higher 💡 Explanation Aneuploidy, is the most common genetic abnormality, accounting for up to 50% of clinical miscarriages. All are true about aneuploidy, EXCEPT: ✓ Correct Answer: B. 50-60% of trisomy 18, fetus die between 12 weeks and 40 weeks