Congratulations, and welcome to your pregnancy! From what to expect each week to how to prepare for labor and beyond, here's the info you need. Here's what you need to know about your baby's development and more throughout your pregnancy. While they could signal your period, if you're pregnant, you can possibly blame implantation, hormonal changes, and your uterus growing. Trimesters break pregnancy into three stages: The first trimester lasts until 13 weeks, the second trimester goes from week 14 to 27, and the third trimester starts at week 28 and continues until birth. Babies rarely arrive exactly on their due date! So yours is just an estimate. Anyone who has a functioning female reproductive system, regardless of intersex or transgender identity, is capable of becoming pregnant. Some people are not capable of becoming pregnant, even with advanced assisted reproductive technology. All you need to know about pregnancy, labour and birth including trying to get pregnant, foods to avoid, antenatal care and how to keep well in pregnancy. Looking for a week-by-week guide to pregnancy? You're in luck! We've got loads of expert-approved info about each week and trimester, including what's up with your growing baby and what changes to expect for yourself. An at-home pregnancy test is the most common way to confirm pregnancy, but you can also confirm you’re pregnant with a blood test. Some of the first signs of pregnancy include a missed period, nausea and fatigue. Learn about the science and symptoms of a woman’s 9-month pregnancy. Explore the science behind the body’s greatest mysteries -- in two minutes flat. From hormone increases and morning sickness. Consider this week-by-week pregnancy calendar your ultimate guide to the next nine months. When you’re pregnant, your baby is changing every day, and your body is keeping pace. This pregnancy tracker will help you better understand the weeks, months, and trimesters of your pregnancy. Learn steps to take, before, during, and after pregnancy or when trying to avoid getting pregnant. Pregnancy is an exciting time and big life change. Learn what you can do to plan and stay healthy.