At 35years Maternal age-related risk for Down syndrome in singleton pregnancy at midtrimester is
Maternal Age-Related Risk for Down Syndrome at Midtrimester in Singleton PregnanciesAgeMidtrimester351/250371/149401/69411/53421/41431/31441/25451/19(Ref: William's Obstetrics; 25th edition)
1 in 31
1 in 69
1 in 149
1 in 250
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