Early pregnancy is the most important period of fetal organogenesis and development. At this time, it is very sensitive to the influence of external factors, and some unfavorable factors may cause fetal damage. Relatively speaking, there are more chances of respiratory tract infections and other viral infections in winter and spring. Folic acid deficiency may be related to fetal neural tube abnormality, placental abruption and premature birth. In terms of fetal health, winter and spring pregnancies require relatively more attention. In winter and spring pregnancies, births tend to occur in the summer and fall, which can be uncomfortable during the hot season. Therefore, if you plan to conceive in summer or autumn, you will have more benefits. Summer and autumn are the seasons when all kinds of vegetables, fruits and dried fruits are available, and it is also necessary for the health of the child for the mother to have a rich and balanced intake of nutrients during the early stages of fetal development. In fact, the advantages and disadvantages are relative, and people can choose the time of conception according to their individual circumstances.