A typical pregnancy lasts 40 weeks from the first day of your last menstrual period (LMP) to the birth of the baby. It is divided into three stages, called trimesters: first trimester, second trimester, and third trimester. The fetus undergoes many changes throughout maturation. How Soon Can You Tell If You Are Pregnant?
Conception to about the 12th week of pregnancy marks the first trimester. The second trimester is weeks 13 to 27, and the third trimester starts about 28 weeks and lasts until birth.
At the end of the first trimester, your baby is already called a fetus and looks like a little human. In the first few weeks, you may not notice your new condition.
Diagram First Trimester Pregnancy Stages Image
