S.C.
It's not a problem. The chemicals don't get into your skin. The problem with doing it while you're pregnant is the fumes. They have a lot of great products on the market that are low odor. Make sure you do it in a well ventilated area if you do it at home. Don't hold the baby or anything until you get the stuff rinsed out of your hair. I colored my hair through both my pregnancies and while breastfeeding.