Signs of Pregnancy/The Pregnancy Test The signs of pregnancy vary from woman to woman, but the most obvious sign usually is a missed period. Calculating a Due Date First, determine the first day of your last menstrual period. Next, count back three calendar months and add one year and seven days to that date. Birth Statistics Statistics relating to birth rates Prenatal Medical Care It may seem like you are having a lot of appointments, but regular visits to your doctor are an important part of a healthy pregnancy. You and your growing baby will be carefully monitored, with tests done to assess any potential risks and develop a treatment plan, if needed. Symptoms and Diagnosis of Multiple Pregnancy Every pregnant woman feels like she’s getting big, but if you’re pregnant with two or more babies, you’ll really be growing fast. Be prepared by learning the signs of a multiple birth.