Excessive exercise may lead to miscarriage. It is generally recommended to exercise reasonably during pregnancy and avoid excessive exercise intensity. Proper exercise during pregnancy can promote blood circulation and enhance physical fitness, which is good for the pregnant woman’s own health and fetal development. However, excessive exercise may lead to miscarriage, jeopardizing the pregnant woman and the fetus. At the beginning of pregnancy, the embryo and the uterus are not yet closely connected, excessive exercise will easily stimulate the uterus to contract with abdominal pain or vaginal bleeding, increasing the chance of miscarriage. In the middle and late stages of pregnancy, the uterus increases significantly, such as excessive exercise will not only increase the fatigue and discomfort of the pregnant woman’s body, but also may stimulate the uterus to contract strongly, so that the fetus in the uterus from the uterine cavity, resulting in placenta previa or miscarriage and other accidents. During pregnancy, you can take a walk or do yoga exercise for pregnant women, swimming and other sports, but to grasp the intensity of the exercise should not be too large, in order to the body does not feel tired for the appropriate, to avoid over-exercise.