Food poisoning in a pregnant woman in her eighth month of pregnancy may affect the development of various systems of the fetus, or cause premature labor, miscarriage, etc. If a pregnant woman suffers from food poisoning in the eighth month of pregnancy, the development of various fetal systems, such as the nervous system and digestive system, may be affected if the toxic food enters the fetus via the placenta. If the toxic food does not enter the fetus via the placenta, but the pregnant woman has severe nausea, vomiting as well as symptoms of dehydration, the supply of nutrients to the fetus may be insufficient, triggering preterm labor or miscarriage. The duration and degree of food poisoning in pregnant women also have different effects on the fetus. If the duration and degree of food poisoning is short and mild, and the treatment is timely, the effect on the fetus is small. However, if a pregnant woman has food poisoning for a long time, the degree is serious and has not been treated in time, it may have a greater impact on the fetus. Pregnant women should pay attention to food hygiene, and when food poisoning such as nausea, vomiting and diarrhea occurs, they should actively seek medical advice and treatment under the guidance of doctors.