Normal pregnancies last nine months and are divided into three time periods called trimesters. During each trimester your body will go through a set of changes brought on by your pregnancy.

During your first trimester, your breasts will grow and may feel sore. You will urinate often because your uterus is growing and putting pressure on your bladder. You may feel more tired than usual. And some women experience nausea referred to as “morning sickness.”

During your second trimester, your abdomen really starts to grow. Morning sickness subsides, and you do not feel as tired or have to urinate as often. You may get leg cramps—a good sign you need more calcium, and you could have heartburn or backaches. Your breasts may begin to produce colostrum, which is intended to nourish the baby before your milk comes in. From this point on, you’ll gain three to four pounds a month until your baby is born.

The third trimester is always the longest stretch of pregnancy. Your feet and ankles may swell from water retention. Urination and leg cramps may occur more frequently. You could be a little more grumpy and tired. When you get really close to birth, your baby will turn inside you and drop lower in your abdomen. This can be uncomfortable, especially with the 25 to 35 pounds you gained since your pregnancy began.

In the end, most women feel that it was all worth it. Pregnancy comes and goes, and the changes that happen to your body will soon be just a memory. Just remember to take good care of yourself so your baby is born healthy.