Blood tests are virtually 100 percent reliable. To confirm your pregnancy, the doctor will follow up with a pelvic exam, to see if the uterus has enlarged. For more information on diagnosing a pregnancy, see a health care provider. For this reason, it's crucial to eat a healthy, balanced diet during pregnancy. Doctors suggest folic acid supplements prior to getting pregnant to decrease the risk of certain types of birth defects.
Most physicians recommend pre-natal vitamins, but never take more than the suggested amount.
Avoid alcohol and drugs, and consult your doctor before taking any medication. It's also a good idea to limit caffeine. If you smoke, do your best to quit. Smoking can cause many problems, including low birth weight and premature delivery. Moderate physical activity during pregnancy is considered extremely beneficial for most expectant mothers.