Pregnant women can affect the fetus when they have diarrhea. One, affect the absorption of fetal nutrients, diarrhea, the intestines can not absorb nutrients, nutrients quickly out of the body, the fetus can not absorb nutrients, will affect the normal development of the fetus. Second, stimulate the contraction of the uterus, resulting in contractions. Pregnant women with diarrhea every day, too many times and for a longer period of time, can easily lead to uterine contractions, resulting in miscarriage. The following points should be noted in the treatment: 1. timely replenishment of water and electrolytes, pregnant women can consume liquid food such as thin rice and porridge, adding a small amount of salt and sugar to the thin rice. 2. it is recommended to use mild drugs, diarrhea mainly lies in accelerated intestinal peristalsis, you can use some more gentle anti-diarrheal drugs. By absorbing the water in the intestine to reduce intestinal movement. 3, careful use of drugs, consult a professional doctor. If the diarrhea is caused by infectious factors, it is necessary for the pregnant woman to use antibiotics, but the pregnant woman herself cannot use the drugs without permission, and must be taken under the guidance of a doctor to avoid harm to the fetus.