What’s wrong with a vague pain in the stomach at the beginning of pregnancy, like before a period?

The vague pain in the stomach at the beginning of pregnancy like the symptoms before menstruation may be related to the pain of fertilized egg implantation, or it may be caused by pre-miscarriage, ectopic pregnancy or other factors.
1. Fertilized egg implantation pain. In the early stages of pregnancy, the fertilized egg will stimulate the uterine lining and the uterus will enlarge after the embryo develops, so there may be slight abdominal pain similar to the feeling of menstruation, which will usually get better after resting, and the pain is mild and does not need treatment.
2. Pre-eclampsia. Early pregnancy stomach pain like before menstruation, may be due to maternal disease or poor embryonic development, trauma and other factors caused by the signs of preeclampsia, usually abdominal pain and vaginal bleeding and other symptoms.
3. Ectopic pregnancy. Ectopic pregnancy is formed when the embryo does not properly settle in the uterine cavity, and the fallopian tube ruptures with the development of the embryo, which will also cause vague pain in the stomach, as well as vaginal bleeding or severe abdominal pain and other symptoms.
4. Other factors. Hidden pain in the stomach at the beginning of pregnancy like before menstruation may also be caused by pelvic inflammatory disease, adnexitis, or gastroenteritis, appendicitis and other diseases. It is necessary to improve the examination in time to confirm the cause of the diagnosis and treatment.