It is recommended not to prepare for pregnancy within six months after dyeing your hair. Hair dyes have a certain impact on pregnancy because they contain chemicals that are harmful to the human body, and during the preparation for pregnancy, they can also lead to a decrease in the quality of the eggs, making it difficult to get pregnant. Even after pregnancy, it will lead to malformation or abnormal neurological development of the fetus, and even serious cases may occur on the phenomenon of fetal arrest or stillbirth, so it is not recommended to dye hair, perm during the preparation period. At the same time, attention should be paid to good pre-pregnancy preparation, as women of childbearing age, before pregnancy should go to the regular hospital for pre-pregnancy examination and counseling, to check whether the current physical condition is suitable for pregnancy, whether it is the optimal period of pregnancy. A small dose of folic acid should be taken in the first trimester of pregnancy, mainly to prevent the occurrence of fetal neural tube development malformation. In addition, care should be taken to avoid exposure to toxic substances and sources of radiation, abstain from tea, smoking and alcohol, and prevent colds and flu.