There is generally no optimal time for pregnant women to remove fetotoxin, which should be taken care of throughout the pregnancy, and it is usually recommended to remove it before delivery. Fetal toxicity in medicine refers to the postpartum acute allergic syndrome, generally manifested as postpartum newborns appear a variety of skin allergic reactions, such as seborrheic dermatitis, skin eczema, scabies, acne rashes and so on. Fetal toxicity occurs mainly due to pregnant women during pregnancy irregular life, diet is not reasonable caused. Therefore, during pregnancy, you need to pay attention to regular work and rest, eat a balanced diet, eat more fresh vegetables, moderate amount of fruits, to ensure that lean meat, eggs, milk and soy products and other protein-rich food intake; secondly, during pregnancy, you should avoid eating cold, spicy and stimulating, as well as fat, sweet, thick and greasy food, as much as possible, light, low-salt and low-fat diet is appropriate. If fetal toxicity occurs during pregnancy, it is recommended to adjust the diet in time, ensure sufficient sleep, and not to use drugs indiscriminately, so as not to affect the normal growth and development of the fetus.