The following causes are common for gynecology when stomach pain occurs during preparation for pregnancy, for example, chronic pelvic inflammatory disease can cause stomach pain, or during ovulation, due to the formation of the corpus luteum, there will be an increase in local pressure, which can also cause stomach pain. Also endometriosis can cause tummy ache. In addition to gynecological diseases, gastroenteritis or urinary tract infections may also cause stomach pain, so it is best to go to the hospital to do the appropriate examination for stomach pain during the preparation for pregnancy. According to the results of the examination to understand the causes of stomach pain, and then give the appropriate treatment, which is more conducive to eugenics, eugenics. It is recommended to have a health checkup and take oral folic acid tablets during the preparation of pregnancy, mainly to prevent fetal neural tube deformities.