Siobhan M. Dolan MD MPH


First-Trimester Screening for Birth Defects

What is the first-trimester screening for birth defects? Near the end of the first 3 months of pregnancy (first trimester), a woman can have two types of tests to show the chance that her baby has a birth defect. When the results are combined, these tests are known as the first-trimester screening. They also may be…

Integrated Test During Pregnancy

The integrated test is a screening test done during pregnancy to find out the chance that a baby has certain birth defects, such as Down syndrome. The test is done in two stages at two different times during the pregnancy. You will get the results after the tests in the second trimester are done. The first stage can be…

Amniotic Fluid

Amniotic fluid is the liquid that surrounds a developing baby (fetus) in the uterus throughout pregnancy. The amniotic fluid protects the fetus from temperature extremes and from being bumped or hurt as the mother moves around. Amniotic fluid allows the fetus to move before birth and is important for lung development…

Triple or Quad Screening for Birth Defects

What is the triple or quad screening? The triple screening measures the amounts of three substances in a pregnant woman’s blood: alpha-fetoprotein (AFP), human chorionic gonadotropin (hCG), and estriol (uE3). When a test for the hormone inhibin A is added, it’s called a quad screening. These tests are also called the…

Home Pregnancy Test

Home pregnancy tests use a sample of a woman’s urine to detect the presence of a hormone (called human chorionic gonadotropin, or hCG) that is produced during pregnancy. If the test is positive for the hormone, it usually means the woman is pregnant. These tests are available without a prescription, and their accuracy…