If you've lost a baby before your pregnancy came to term, you've
had a miscarriage. One out of six pregnancies ends in
miscarriage, with 75 percent of these ending in the first 12
weeks. If you've had one miscarriage, you're not considered
infertile, but miscarriage, also called spontaneous abortion, is
considered to be a form of infertility. You might have problems
with your reproductive system causing your body to abort the
fetus. There can be many explanations for a miscarriage. If you
have a history of spontaneous abortions and are trying to have a
baby, it's a good idea to talk to a physician before you
conceive. Being under a doctor's care before and during
pregnancy is also a good idea.