Pregnancy Division is a term used to describe the three stages of pregnancy, which are divided into trimesters. Each trimester lasts for approximately three months and is marked by different physical and emotional changes in the mother and baby. During the first trimester, the baby's organs and body systems begin to form, while the mother may experience morning sickness and fatigue. The second trimester is often considered the most comfortable period of pregnancy, as the mother's energy levels increase and the baby continues to grow. The third trimester is the final stage of pregnancy, during which the baby's growth is rapid and the mother may experience difficulty sleeping and increased discomfort.