Doing hair without the use of chemical agents during pregnancy is possible, doing hair oil using chemical agents during pregnancy is not recommended. Doing hair after pregnancy is just a simple hair cut short or do a hairstyle, do not need to use chemical agents, will not have an impact on the mother and fetal development, this situation can go to do. Doing hair after pregnancy is dyeing and perming the hair, to be in contact with chemical agents, which contain toxic heavy metals, such as mercury, lead, etc., will be absorbed by the scalp into the blood, and the fetus is dependent on the absorption of the mother’s blood, and through the blood circulation into the placenta, which will affect the growth and development of the fetus. Therefore, after pregnancy to avoid contact with all items containing radioactive or chemical agents, especially in the early stages of pregnancy, will increase the chances of fetal malformation development, although not absolute, can be avoided as far as possible.