Generally speaking, pregnancy does not cause much harm to the body, but sometimes the body is not able to adapt to the changes caused by pregnancy, and abnormalities may occur, causing more harm to the body. After pregnancy the body’s endocrine system, reproductive system, circulatory system, urinary system, digestive system, etc., will have different degrees of changes to meet the needs of fetal growth and development. Physiological changes caused by pregnancy, except for breastfeeding, can basically be restored to the pre-pregnancy state 42 days after delivery. Therefore, pregnancy generally has less impact on the body. Women who are pregnant at an advanced age or who have underlying diseases before pregnancy will also have a higher chance than normal women of developing gestational hypertension syndrome, gestational diabetes mellitus, hyperthyroidism and other diseases after pregnancy, and some of them will need lifelong medication, which can even be life-threatening and more harmful to the body as a result. Women should be psychologically prepared in advance before getting pregnant, and during pregnancy, they should strengthen their nutrition, get more rest, and seek medical attention as soon as possible if they have any uncomfortable symptoms to avoid adverse effects. After giving birth, you should actively exercise to promote the body to return to the pre-pregnancy state as soon as possible.