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Age is not the biggest factor in a healthy pregnancy. The biggest factor is the good health of the mother. Becoming pregnant after the age of 35, however, poses a number of potential problems. Chances for conception decrease with age. The incidence of miscarriage and premature birth is higher in later-life pregnancies. So is the likelihood that the mother will develop diabetes or high blood pressure. The chances that a baby will be born with a genetic defect increases, too.
So along with other health considerations, a pregnant woman in her mid-thirties or older should:
This is a test performed at 14-20 weeks of pregnancy. Amniocentesis can detect Down’s syndrome, Tay-Sachs disease, sickle cell anemia, Rh incompatibility, and spina bifida. (Amniocentesis will also reveal the sex of the child, but it’s never done for that purpose alone.) The doctor uses a long needle to draw out a sample of amniotic fluid from the sac surrounding the fetus and is tested for genetic abnormalities. The test itself presents a small risk (less than 1%) of miscarriage in the second trimester of pregnancy.
Amniocentesis can’t detect abnormalities such as a club foot or cleft palate, so normal results don’t necessarily guarantee a normal baby. Another technique called chorionic villous sampling (CVS) analyzes a small sample of the placenta and can be performed earlier than amniocentesis, (between weeks 8 and 12 of the pregnancy). The earlier testing is done, the more time the prospective parents and their doctor have to decide on the best course of action.