After pregnancy, during the development of the embryo, it will always lead to discomfort in the mother’s body. The main causes of vague pain in the stomach in early pregnancy include: 1. the mother suffers from gynecological diseases before pregnancy, such as pelvic inflammatory disease, endometritis, uterine fibroids, ovarian cysts and other diseases, and after pregnancy, these symptoms are more obvious due to the congestion of tissue in the pelvic cavity; 2. if overexertion, strenuous exercise in early pregnancy 2, if in the early stages of pregnancy overexertion, strenuous exercise or after sex, may induce uterine contraction and vague abdominal pain, pregnant women should pay attention to immediate bed rest; 3, if the vague abdominal pain is accompanied by vaginal bleeding, generally indicates the performance of pre-eclampsia, which may be caused by chromosomal abnormalities, but also may be a viral infection, drug damage, etc.