Miscarriage is the loss of pregnancy before 20 weeks of pregnancy. The embryo or fetus cannot live on its own outside the uterus that early in pregnancy. The medical term for miscarriage is spontaneous abortion.
Miscarriages are common. For every ten pregnancies, 1 to 2 end in miscarriage. Miscarriage is most likely to happen early in pregnancy — in fact, 8 out of 10 miscarriages happen in the first three months of pregnancy.