There are many reasons for the stomach pain in early pregnancy, mainly the following: 1. Consider that it may be caused by pre-eclampsia miscarriage, pregnant women will feel lower abdominal cramps, pain, accompanied by vaginal bleeding and other symptoms, it is recommended that pregnant women go to the hospital for examination in a timely manner, under the diagnosis of the physician to use progesterone, dydrogesterone, etc. to protect the fetus treatment. 2. It is also possible that the stomach pain in early pregnancy is caused by ectopic pregnancy, which is the most obvious symptom of ectopic pregnancy.