Early pregnancy stomach pain like menstrual cramps may be a normal physiological phenomenon caused by hormonal changes, but also may be caused by preeclampsia, ectopic pregnancy and other diseases, as well as other diseases such as hyperemesis gravidarum. 1. Physiological phenomenon: pregnant women in the early stages of pregnancy symptoms like menstrual cramps, may be the early stages of pregnancy, pregnant women’s hormone levels change, will lead to early pregnancy pregnant women like menstrual cramps stomach pain phenomenon. 2. Pre-eclampsia: Pre-eclampsia is mainly caused by abnormal embryonic development, pregnant women with systemic diseases and other factors, the patient will have a small amount of vaginal bleeding, lower abdominal pain and can not be relieved, lower back pain and other symptoms. 3. Ectopic pregnancy: Ectopic pregnancy is caused by tubal disease such as salpingitis, the embryo is planted in the fallopian tube, not in the uterine cavity, the patient’s main symptoms are abdominal pain, dysmenorrhea, vaginal bleeding and so on. 4.Other:other diseases such as hyperemesis gravidarum and appendicitis can also lead to stomach pain in early pregnancy like menstrual cramps. When patients experience stomach pain like menstrual cramps in early pregnancy, it may be a normal physiological phenomenon and does not require treatment. If it is caused by a disease, the patient should consult a doctor in time and follow the doctor’s instructions for treatment.