If you have just found out that you are pregnant and you have stomach pain, there are several conditions: 1. clinically, because of the enlargement of the uterus, the uterine ligaments are involved, so there will be stomach pain, but this pain is often vague and does not cause vaginal bleeding. 2. caused by pre-eclampsia, because of progesterone deficiency or other reasons, resulting in abnormal development of the uterus causing pre-eclampsia, clinically, it will also cause stomach pain. 3. The initial diagnosis can be made through clinical monitoring of blood HCG. For this condition, it is recommended to do ultrasound examination, HCG and progesterone laboratory tests, and then give treatment according to the results.