There is no optimal time to perm your hair as the chemicals used may affect the fetus through the pregnant woman, so it is not recommended to perm your hair throughout your pregnancy and while breastfeeding. There is no optimal time to get a perm. The process of getting a perm is very tedious and involves the use of a softening agent to soften the hair, followed by a styling agent to fix the hair. All of the above procedures require the use of chemicals, which during pregnancy or breastfeeding can enter the fetus through the pores of the scalp and enter the bloodstream or breast milk, thus posing a serious risk to the development of the fetus. Therefore, perming the hair during pregnancy may lead to poor development of the fetus, or the risk of developmental malformations. It is not only not recommended to perm hair during pregnancy, but also some toxic and harmful substances, rays or prohibited drugs should not be contacted or taken, so as not to affect the development of the fetus, resulting in irreversible consequences.