Slight abdominal pain in early pregnancy is generally normal, such as fertilized egg implantation stimulation caused by the degree of abdominal pain is more serious or longer duration is not normal, such as preeclampsia, ectopic pregnancy, gastrointestinal diseases. 1. Fertilized egg implantation stimulation: fertilized egg implantation in the endometrium belongs to an invasive behavior, some women are more sensitive, there may be a slight discomfort in the abdomen, the duration of a short period of time, generally do not need special treatment. 2. Pre-eclampsia: the fetus, the mother, the father, the environment and other factors may cause pre-eclampsia, pregnant women may have symptoms of abdominal pain, often accompanied by vaginal bleeding, which is abnormal, the need for fertility preservation treatment, and according to the condition of the decision of the next step in the treatment. 3. Ectopic pregnancy: The gestational sac does not normally settle in the uterine cavity, but settles in a location other than the uterine cavity, such as the fallopian tube, abdominal cavity, often manifested as abdominal pain, accompanied by vaginal bleeding. The next step should be decided according to the site of implantation, whether miscarriage or rupture, and the amount of bleeding. 4. Gastrointestinal disorders: It is not normal for early pregnancy to be combined with gastrointestinal disorders, such as dyspepsia caused by intestinal flora disorders, and abdominal pain caused by inflammatory stimulation of the gastrointestinal tract. There are more reasons for abdominal pain in early pregnancy, whether it is normal or not should go to the hospital through the examination, by the professional doctor to judge.