The main manifestations of pregnancy are as follows: Firstly, after pregnancy, menstruation will first stop, especially for women with regular menstruation, if menstruation is delayed for more than 7 days, the chance of pregnancy is very high. Secondly, a series of early pregnancy reactions will occur after pregnancy, such as nausea, vomiting, anorexia, acidity, drowsiness, weakness, dizziness, headache and so on. These early pregnancy reactions are usually not serious and will disappear naturally in about 12 weeks of pregnancy, so no special treatment is needed. Thirdly, after pregnancy, there will be breast swelling and pain, increase in breast volume, thickening of nipples and deepening of areola coloring. Fourth, in the first trimester of pregnancy, as the uterus grows and presses forward on the bladder, it will lead to the symptoms of frequent urination. Fifth, the most obvious symptom after pregnancy is the gradual enlargement and bulging of the lower abdomen after the third month of pregnancy.