Tests for women expecting multiple pregnancy

If you are carrying more than one baby, the number of tests you receive, and when you receive them, will be different. Some researchers recommend that if you are at least 32 years old and your doctor determines you are carrying more than one baby, you should have chromosome testing, such as amniocentesis or chorionic villus sampling. Research indicates that there is a slightly higher chance of an abnormality when a woman is carrying two or more babies. In many cases, screening tests are the first indication a woman is carrying more than one baby. Sometimes these tests give an "abnormal" result. Be assured that an abnormal test result does not necessarily indicate the babies have a problem; it alerts the doctor to perform follow-up tests.

Often with a multiple pregnancy, blood tests are repeated around week 28 to check for gestational diabetes. Tests can also reveal if the mother-to-be is anemic, which is more common in women carrying multiples.

You may have more tests if other problems develop. If there's an indication of preterm labor or pre-eclampsia, you may have amniocentesis to check lung maturity in the babies. Premature lung disease is a serious complication for multiples who are delivered too early.