The Likelihood That an Individual Woman Will Give Birth to a Child

The likelihood that an individual woman will give birth to a child with Down syndrome increases with maternal age; however, the vast majority of babies are born to women younger than age 35. As a result, the American College of Obstetrics and Gynecology recommends screening for Down syndrome for

A) all pregnant women.
B) only pregnant women over age 35.
C) only pregnant women over age 45.
D) pregnancies in which either the mother or the father is over age 35.
E) pregnancies in which both the mother and the father are over age 35.