Early pregnancy stomach pain like menstrual cramps may be due to the gradual enlargement of the uterus, there may also be preeclampsia, ectopic pregnancy and other abnormalities. 1. Physiological factors: a small number of women in early pregnancy, because of the gradual increase of the uterus, the lumbar spine produces a slight pressure, or pregnancy before the existence of lumbar spine disease, there may be lumbosacral, small abdominal pain. The above situations are normal physiological phenomena and need not be overly worried. 2. Pre-eclampsia: For women in the early stages of pregnancy, over-excited emotions, insufficient secretion of progesterone, abnormal embryonic development and other factors can lead to signs of pre-eclampsia. The patient will have different degrees of abdominal pain, vaginal bleeding and other symptoms. 3. Ectopic pregnancy: Ectopic pregnancy refers to the part of the fertilized egg that is deposited outside the uterine cavity, mostly in the fallopian tube area. When the fertilized egg gradually increases in size, it will cause pressure on the fallopian tube, resulting in abdominal pain, vaginal bleeding, pressure and other phenomena. Early pregnancy stomach pain like menstrual cramps has more causes, patients are advised to seek timely medical examination, according to the results of the examination, follow the doctor’s instructions for appropriate treatment.