Pregnancy blood tests are over 99% accurate at detecting hCG, a hormone that rises after conception. False negatives can occur if the test is taken too early, so timing is important. Blood tests can ...

In the 1980s, researchers established that certain blood tests in the second trimester could predict the risk of Down syndrome in the fetus and thus enable many women to avoid having amniocentesis.

Blood tests are a routine part of your prenatal care. When you go for your initial visit either with your family doctor, OB, or your midwife, you'll be asked to give some blood. This is to check your ...