Pregnancy Weeks: When You Know, Feel, and See Pregnancy Study 2019: We asked 60,000 women about their pregnancies. See the results about when they found out below. Pregnant women find out about their condition on average at 7 weeks and 1 day Women learn the baby's sex on average after 17 weeks At 16 weeks, pregnant women start to feel the baby's first movements Women consider that their belly starts to show on average at 12 weeks The typical pregnancy ends after 38.7 weeks