Fetal growth is typically divided into three trimesters:
1. First Trimester (0-12 weeks): This stage involves rapid cell division and the formation of major organs. By the end of the first trimester, the fetus is about 3 inches long and weighs around 1 ounce.
2. Second Trimester (13-26 weeks): The fetus continues to grow in size and complexity. Organs begin to mature, and the fetus starts to move. By the end of the second trimester, the fetus is about 14 inches long and weighs approximately 2 pounds.
3. Third Trimester (27-40 weeks): This period is marked by significant weight gain and maturation of the organ systems. By full term, the average fetus is about 20 inches long and weighs around 7.5 pounds.
