K.C.
It's safe. Some dr.'s will tell you in your first trimester not to do it, just because your first trimester you have a higher risk of miscarriage. Nothing due to coloring your hair, but they said to avoid stuff so that women don't blame themselves for causing the miscarriage, since you don't really know a lot of the times why you miscarried. Hope that makes sense. But other wise it's ok. I colored my hair with both kids a couple of times while I was pregnant. They came out fine.