This photo shows a baby at 36 weeks of gestational age during the third trimester. During this stage: The waxy coating that protects the skin (vernix) becomes thicker.
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.
After the third month of pregnancy, the embryonic stage is over and the fetal stage begins, so the embryo is now called fetus. The baby-to-be already has all the organs but they are still developing.