Doctors as group are very hesitant to give pregnant women the go ahead to do certain things. It’s true that a sip of wine won’t hurt you here or there but most doctors will tell you to stay clear of any alcohol at all.
There is limited scientific data available regarding the safety of dyeing hair while pregnant. Animal studies suggests it’s safe to get hair colored/dyed. …show more content…
Which is why processes such as streaking and frosting are more widely encouraged than say full coverage. Also, instead of using an all-over hair color, consider a process like streaking, highlighting, painting, or frosting, in which the chemicals have little or no contact with your scalp. (Any hair-coloring agents absorbed into your system would come through your skin, not through your hair shaft.) - http://www.babycenter.com/404_is-it-safe-to-dye-my-hair-during-pregnancy_3273.bc
Another thing to keep in mind is the fact that pregnancy, in itself, can naturally change the hair’s texture. Pregnancy may also cause your hair to react differently to perming or coloring. If this is the case, you may want to wait until after pregnancy to treat your hair.
It is quite normal for hair to respond in unpredictable ways to chemical treatments. Many women find their hair does not respond to relaxers in the usual manner when pregnant and it’s a possibility that this can occur when dying hair which is another reason to be more conservative with hair dying plans. Be sure to take the following precautions when dyeing your hair. These precautions apply not only when you’re pregnant.
Delay dyeing for as long as you can. Second trimester is good. Third trimester is even better.
Use exactly as directed.
Ensure the area you dye your hair in is properly