Diarrhea is also known as diarrhea. If a pregnant mother has mild diarrhea in early pregnancy, it will not affect the fetus, but if she has severe diarrhea, there is a high risk of miscarriage, so she needs to seek medical advice and take medicine under the guidance of a doctor. If the diarrhea is severe, it may cause dehydration, electrolyte disorder and weight loss, which may cause fetal stunting and growth retardation. If a pregnant mother has mild diarrhea in late pregnancy, it does not matter and will not affect the fetus. If a pregnant mother has severe diarrhea in late pregnancy, it will have adverse effects on both the pregnant mother and the fetus, so she needs to consult a doctor in time and actively cooperate with the doctor for treatment, and premature birth may occur if the treatment is not timely.