The possible reasons for the manifestation of vague pain in the stomach at 14 weeks of pregnancy are mainly: 1. Premature miscarriage, the patient shows the manifestation of miscarriage after 14 weeks of pregnancy, which leads to the symptom of vague pain in the stomach. This symptom is not relieved after rest, and accompanied by obvious abdominal drop, need to go to the hospital as soon as possible. 2, the ligaments on both sides of the uterus are stretched, with the weeks of pregnancy, the bottom of the uterus rises, the round ligaments on both sides of the uterus are stretched, easy to appear this symptom. The symptoms are usually obvious when walking or changing position for a long time, and will generally be relieved quickly after bed rest. 3, improper diet, some pregnant women because of the diet is too greasy or cold during pregnancy, the gastrointestinal tract is stimulated to speed up the peristaltic function, may appear abdominal vague pain symptoms, pay attention to rest, do not overwork, go to the hospital for review at any time.