Why would a doctor do blood tests on a pregnant woman?
A. To prove paternity, or who the father of the fetus is
B. Normally, a doctor does urine tests on a pregnant woman, not blood tests.
C. To look for risky sexually transmitted diseases or cancers
D. To make sure she was actually pregnant
E. To look for risky infections, diseases, or to screen fetal blood which gets mixed into the mother's blood