It is best to get pregnant only after three months of chest X-ray, because there is a certain amount of radiation absorbed by the woman during the process of chest X-ray, which has a radiation effect and is known to affect the quality of the eggs. If a woman becomes pregnant too early, it will easily lead to a decrease in the quality of the fertilized eggs, thus increasing the chance of embryonic abortion, spontaneous miscarriage, fetal development malformation and intrauterine growth retardation. During the preparation period, it is important to avoid the adverse effects of exposure to bacteria, viruses, radiation, etc., as well as the stimulation of tobacco and alcohol. During the first trimester of pregnancy, attention should also be paid to taking appropriate oral folic acid tablets to prevent the possibility of fetal neural tube development malformations, to adjust the body to a healthy state, and to enhance the body’s resistance and immunity for the health of the pregnant woman and the growth and development of the fetus after pregnancy.