Gynaecology & Obstetrics At 35years Maternal age-related risk for Down syndrome in singleton pregnancy at midtrimester is A 1 in 31 B 1 in 69 C 1 in 149 D 1 in 250 💡 Explanation At 35years Maternal age-related risk for Down syndrome in singleton pregnancy at midtrimester is ✓ Correct Answer: D. 1 in 250