Strenuous exercise during pregnancy can lead to miscarriage. Especially in the first 3 months of pregnancy, the fetus is not yet developed and the placenta will not be particularly fixed. At this time, if you exercise too much or are often anxious, angry or nervous, it will easily lead to uterine contractions and increase the chances of miscarriage. During pregnancy, you should try to keep your mood relaxed, don’t exercise strenuously, don’t overwork yourself, and you need to enhance your nutrition and eat more fresh fruits and vegetables. During the first three months of pregnancy, you should also be careful not to have intercourse as much as possible. If you have an orgasm during intercourse, it can cause uterine contractions and increase the chances of miscarriage. In the middle of pregnancy, it is relatively safe to exercise in moderation, but you should not exercise strenuously or overexert yourself. In the middle and late stages of pregnancy, attention should be paid to the preservation of the fetus, because in the middle and late stages of pregnancy the fetus grows, the uterus also grows, the pregnant woman’s belly bulges more obviously, her weight increases, and she moves in a clumsy manner, so attention should be paid to the preservation of the fetus.