Mothers-to-be are afraid of various diseases during pregnancy, especially colds. During the change of seasons, due to the change of hormone levels during pregnancy, the immune function of mothers-to-be is weaker and colds are often unpreventable. Especially in the early stages of pregnancy, some mothers-to-be easily terminate their pregnancy, which is not advisable. Early pregnancy is a critical period for fetal development. The high fever and metabolic disorders caused by colds may have an impact on fetal growth and development. High fever can affect embryonic cell development and is particularly harmful to the fetus’ nervous system. Viruses can enter the fetus through the placenta, potentially causing congenital heart disease, hare lip, hydrocephalus, anencephaly and microcephaly. High fever and toxins can stimulate the mother-to-be’s uterus to contract, causing miscarriage and premature birth, and high fetal mortality. The common cold, with mild symptoms, has little effect on the fetus. Severe colds, especially influenza, when it is difficult to ensure that the fetus is not affected, have a teratogenic risk and need to be treated aggressively. Even if there is concern in case of any problem, it can be subsequently ruled out by means of medical detoxification tests. Nowadays, obstetric examination technology is quite sophisticated, and ultrasound, amniocentesis and other tests can be used to understand the development of the fetus. If there are any problems with the fetus, it is still too late to terminate the pregnancy. It is not recommended to abort the fetus hastily, but to evaluate the growth and development of the fetus in a professional medical institution on time, so that if the fetus is found to be abnormal later, it is not too late to terminate the pregnancy.