Pregnant women with diarrhea can affect the fetus. Pregnant women with too frequent diarrhea can lead to loss of electrolytes and dehydration, which may cause malnutrition in the fetus, and in severe cases, miscarriage or premature birth. If a pregnant woman has diarrhea too often, she will lose water and electrolytes, especially potassium ions, which will cause dehydration and affect the absorption of fetal nutrients, resulting in fetal malnutrition. In addition, diarrhea in pregnant women will accelerate intestinal peristalsis, causing intestinal cramps and flatulence, stimulating uterine contractions, which can easily cause miscarriage. Therefore, if a pregnant woman has diarrhea symptoms, she should always pay attention to fetal movement, observe whether there are signs of miscarriage or preterm delivery, and go to the hospital in time. Pregnant women must usually maintain good eating habits and do not eat food that has just been taken out of the refrigerator. In addition, edible fruits should be washed under tap water to prevent bacteria and pesticide residues.