In late pregnancy near delivery, some pregnant women may experience vague pain in the abdomen, which may be caused by physiological factors or pathological factors, the common reasons are as follows: 1, physiological factors 1, fetal enlargement: as the fetus gradually increases in late pregnancy, the uterus also increases, coupled with the fetal activities in the uterus, will cause the uterine ligaments to be stretched, resulting in vague pain in the abdomen of pregnant women 2, pseudo contractions: if the abdominal pain lasts for a short time, intermittent time is long, no regular, mostly considered pseudo contractions, pay attention to close observation; 3, true contractions: if in addition to abdominal pain, also accompanied by a regular tightening of the belly hard feeling, consider the performance of true contractions, belongs to the precursor of labor, it is recommended to go to the hospital in time for delivery. Pathological factors 1, gynecological inflammation: If inflammation of reproductive organs occurs in late pregnancy, such as cervicitis, pelvic inflammatory disease, inflammatory stimulation may appear abdominal pain, if abdominal pain accompanied by increased leucorrhea secretions, odor, it is recommended to go to the hospital in a timely manner, improve the routine examination of the leucorrhea, clear causes, targeted treatment; 2, digestive tract diseases: If a pregnant woman unintentionally ate cold, unclean Food, may stimulate the gastrointestinal mucosa, induce gastroenteritis, intestinal spasm, resulting in the appearance of abdominal pain, usually accompanied by nausea, vomiting, diarrhea and other symptoms. In addition, intestinal polyps and tumors may also cause vague pain in the small abdomen. If you have the above mentioned manifestations, it is recommended to promptly consult a doctor for examination and symptomatic treatment of the cause as well as the symptoms.