Pregnancy Stages

Learn about what to expect during the different stages of pregnancy.

The progress of a pregnancy can be judged as normal or abnormal only when the gestational age is accurately known. Gestational age is very important when complications occur in the pregnancy and early delivery may be necessary. It is also important to know gestational age so that an overdue baby can be carefully monitored.

One of the most frequent questions a woman wants answered is "How far along is my pregnancy?" or "When am I due?" To help you follow some of the changes you may encounter during your pregnancy, this site is divided into "month by month" segments. Each month tells what you can expect as your pregnancy progresses.

When discussing pregnancy, the terms "stage" and "trimester" are frequently used. Typically, the stages of pregnancy are discussed by the week (1 through 40), the month (1 through 9) or by the terms "trimester".  The first three months of a pregnancy is referred to as the 1st trimester.

Discusses the changes taking place during months 4-6 of a pregnancy.

Discusses the changes taking place during months 7-9 of a pregnancy.