The pain in the abdomen of a pregnant woman who is just pregnant and feels like she has her period may be caused by the following reasons: 1. It may be due to physiological reasons, because the pregnant woman is just pregnant, so there may be swelling and flaccidity of the body and abnormal secretion of hormones in the body, so it will cause this situation, but generally do not need to worry, with the growth of pregnancy time, the phenomenon will gradually disappear. 2. But it may also be caused by pathological factors, such as pregnant women may have gynecological inflammation before pregnancy, or there are omens of pre-miscarriage. Therefore, it is recommended that patients should go to the hospital for examination in time to first identify the cause and then carry out reasonable treatment to prevent harm to their own growth and development or that of the fetus, and remember that pregnant women should not use drugs indiscriminately by themselves, otherwise they are likely to cause harm to their bodies.