Pregnancy begins after implantation and lasts about 40 weeks. Knowing what to expect can help protect your health and the baby’s health. Many factors can affect a pregnancy. Women who receive an. Pregnancy Learn steps to take, before, during, and after pregnancy or when trying to avoid getting pregnant. View All Planning for Pregnancy During Pregnancy After the Baby Arrives Avoiding Pregnancy Learn to identify early signs of pregnancy with our friendly, expert guide. Recognize subtle changes and know when to take a test for peace of mind. What’s happening in those very early weeks of pregnancy? A lot more than you’d think. It all starts with one tiny cluster of cells.In this video, we walk thr. Pregnancy lasts 40 weeks and is split up into three trimesters. Learn more about what you can expect. Complete clinical guide to a healthy pregnancy. Verified by APA specialists to ensure safe maternal and fetal outcomes with the latest 2026 standards. Our complete pregnancy guide gives you expert info and advice about your growing baby and the changes in your body, by week and by trimester. Know what to expect during pregnancy and learn about pregnancy symptoms, nutrition, fitness, labor & delivery, week by week pregnancy information, and more. Pregnancy is the time during which one or more offspring gestates inside a woman 's uterus. [4][10] A multiple pregnancy involves more than one offspring, such as with twins. [11] Conception usually occurs following vaginal intercourse, but can also occur through assisted reproductive technology procedures. [12] A pregnancy may end in a live birth, a miscarriage, an induced abortion, or a. Taking care of your health while you're pregnant will help give your baby a healthy start. Learn about prenatal care, nutrition, and staying fit during pregnancy.