Abdominal pain at 15 weeks of pregnancy is mostly due to the squeezing of some organs by the increasing size of the fetus, but gynecological diseases and pre-miscarriage cannot be ruled out, so it is recommended to go to the hospital for a complete checkup and then do the targeted treatment. With the increase of pregnancy time, the increasing size of the fetus squeezes some of the organs, which can lead to abdominal pain, which is normal, and you should pay close attention to observe the abdominal situation. If the pain does not subside, or if there is vaginal bleeding, you should consult a doctor. If abdominal pain is caused by preeclampsia, you should consult a doctor for timely treatment to preserve the fetus under the doctor’s guidance. During the treatment, pay attention to rest, maintain adequate nutrition, and do not engage in strenuous exercise. Generally, progesterone, such as dextroprogesterone, or progesterone can be injected into the muscle. If the bleeding is prolonged, antibiotics can be used to prevent infection, and if necessary, the uterus can be cleared. If the pregnant woman herself suffers from pelvic inflammatory disease, vaginitis and other gynecological diseases, may also appear in the stomach hidden pain, need to choose according to the situation of the medication, the general use of antibiotics or antifungal drugs treatment.