Colds are mainly categorized into viral and bacterial infections, and if an infection occurs during pregnancy, some caution should be exercised in the use of medication. First of all, for viral colds, commonly used compound cold medicine, which contains acetaminophen, pseudoephedrine hydrochloride, chlorpheniramine maleate and other ingredients, such cold medicines, although effective in relieving the symptoms of colds, but pregnant women should not be used; and for bacterial colds are generally treated with antibiotics, but some of the antibiotics belong to the drugs prohibited during pregnancy, but also not conducive to the use of pregnant women. The reason why many drugs can not be eaten, because according to the length of pregnancy time is different, cold and flu medicines will have a certain impact on the fetus: 1, 4 weeks of pregnancy: can lead to miscarriage or no effect, in the 28 days of menopause to eat cold and flu medicines, due to the early stages of pregnancy, the mother and fetus contact is small, generally follow the law of “all or nothing”, if the cold and flu medicines If the cold medicine can cause obvious effect on the fetus, it will cause the pregnant woman to miscarry, if the cold medicine has no effect on the fetus or the effect is very small, then the fetus can continue to grow; 2. 4-12 weeks of gestation: the fetus may be malformed and thus lead to the pregnant woman’s miscarriage, this is a critical period of embryonic development, the central nervous system, the heart, the digestive organs, the limbs and so on are gradually formed, and the sensitivity of the drug is high. Due to the more components of cold medicines, the possibility of influencing the fetus is much higher than other periods; 3. After 12 weeks of pregnancy: it may cause malformation but the probability is small, and it should be confirmed through examination, at this time, the development of the fetus is more stable, and it is not easy to be influenced by cold medicines than before 12 weeks. Pregnant women who have fever, cold, cough and other cold symptoms, it is not recommended to self-medication, you can first use physical cooling, sea saline spray nasal wash, drink water and other ways to ease the symptoms, in addition to pay attention to a light diet in daily life, vitamin supplements, generally three to five days symptoms can be relieved. However, if severe coughing, nasal congestion and high fever occur, timely medical treatment should be sought.