Little is known about the affects of using chemicals to perm or straighten your hair during pregnancy. One particular study showed that using these products would not increase your risk of premature birth or having a low birth weight baby, but it didn’t mention birth defects. Only a very small amount of these products will soak into your scalp during a treatment. If you decide to have your hair permed or straightened, perhaps only have one treatment, to limit your exposure.
You should feel good about yourself while you are pregnant. So consider whether colouring, perming or straightening your hair will make you feel good or just make you worry. Just to err on the side of caution, many expectant mums-to-be wait until their second trimester to have these beauty treatments.