Diarrhea during the prenatal period is usually not related to labor, but may be related to gastrointestinal disorders, gastroenteritis, unhygienic diet, or cold. If diarrhea occurs once in a while during the prenatal period, it may be caused by improper diet or environmental influence. You can adjust your diet, pay attention to keep warm and drink more water, which can gradually reduce the diarrhea, and continue to observe the development of the fetus, and if necessary, use montelukast or bifidobacterium under the guidance of the doctor for treatment. However, if the diarrhea is more frequent, it may be due to gastrointestinal disorders and gastroenteritis, and should be promptly seen by a hospital to avoid severe diarrhea triggering uterine contractions, which may lead to early delivery. If labor is imminent, it may be accompanied by symptoms such as falling of the uterine fundus, abdominal cramps, increased discharge from the cervix and vagina, reduced fetal movement, redness, regular contractions, dilatation of the uterine opening, and descent of the fetal previa, etc. At this time, you should bring the necessary items for labor to the hospital in time. Therefore, during the prenatal period, pregnant women should pay attention to keep warm and avoid getting cold, pay attention to hygiene in diet, eat a light diet rich in high quality protein, high vitamin and easy to digest, and avoid eating cold and spicy stimulating food to avoid diarrhea.