Your doctor will ask about your medical history and examine you. Even if you used a home pregnancy test, another pregnancy test often is needed to confirm that you are pregnant. In some cases, you will need an ultrasound to determine how many weeks into the pregnancy you are and the size of the fetus, and to make sure the pregnancy is not ectopic. An ectopic pregnancy is one that is growing outside of the uterus. An ectopic pregnancy usually occurs in the tube that carries the egg from the ovary to the uterus (Fallopian tube) and is commonly called a tubal pregnancy.
A blood test will determine your blood type and whether you are Rh positive or negative. The Rh protein is made by the red blood cells of most women. These blood cells are considered Rh positive. Some women have red blood cells that do not produce Rh protein. These blood cells are considered Rh negative. Pregnant women who have Rh-negative blood are at risk of reacting against fetal blood that is Rh positive. Because a reaction can harm future pregnancies, Rh-negative women usually receive an injection of Rh immunoglobulin (RhIG) to prevent Rh-related problems after miscarriage or abortion.