Stomach pain in 12 weeks of pregnancy can be seen in normal conditions, but it can also be a combination of gynecological diseases, urinary stones, preeclampsia and other conditions in pregnant women. Under normal circumstances, the gradually increasing uterus from the 12th week of pregnancy will pull on the uterine ligaments, which can lead to mild pain in patients; Gynecological diseases such as pelvic inflammatory disease (PID), which is particularly prevalent in sexually active genitals, can also cause stomach pain. In addition, urinary stones can cause stomach pain in pregnant women; stones are usually colicky, and patients may also experience dysuria. If the patient has persistent tummy pain, preeclampsia should be suspected, and she should go to the obstetrics and gynecology clinic of a regular hospital, and use birth-preserving medications under the guidance of a doctor.