During pregnancy, menstruation stops and nausea, vomiting and other pregnancy reactions occur. At the beginning of pregnancy, the first thing that happens is the cessation of menstruation. Depending on the individual’s condition, nausea, vomiting and other pregnancy reactions may occur, and due to the hormonal changes in pregnancy, the breasts begin to increase in size and become swollen and painful, and in the middle of pregnancy, with the continuous development of the fetus, there will be a bulge in the abdomen, and in the late stages of pregnancy, there will also be contractions, and back pain and other symptoms. Fatigue, loss of appetite, drowsiness and other symptoms can also occur during pregnancy. It is important to take proper nutrition and vitamins, develop good work and rest habits, pay attention to rest, and undergo regular obstetric examinations during pregnancy to ensure the normal development of the fetus, and to consult a doctor in a timely manner if you feel unwell.