Stomach pain like menstrual cramps in early pregnancy may be abnormal. It may be due to preeclampsia, ectopic pregnancy, or caused by acute appendicitis and other intestinal diseases. 1. Pre-eclampsia: Early pregnancy generally refers to the first week of pregnancy to about thirteen weeks of pregnancy, this stage of embryonic development is mostly in an unstable stage. If the pregnant woman has obvious emotional fluctuations, or poor personal habits, abnormal embryonic development and other factors, will lead to pregnant women to appear stomach pain, a small amount of vaginal bleeding and other manifestations of premonitory miscarriage. 2. Ectopic pregnancy: Ectopic pregnancy means that the fertilized egg is not deposited in the uterine cavity, but may be deposited in the fallopian tube and other parts of the uterus. With the gradual development of the fertilized egg, it will cause the rupture of the fallopian tube, and symptoms such as abdominal pain and vaginal bleeding will appear in the early stage. 3. Acute appendicitis: Some women in early pregnancy may have acute appendicitis due to factors such as poor diet and decreased immunity, which can also cause pain around the umbilicus. Early pregnancy stomach pain like menstrual cramps has more causes, it is recommended to seek medical attention in time, under the guidance of the doctor in order to clarify its specific causes, and give targeted treatment, so as not to lead to other serious consequences.