Consider waiting to color your hair until the second or third trimester, when your developing baby is less vulnerable. Also, rather than 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.)
If it was me, I would not take the chance on hurting my baby just so my own hair looked good.
at 5:13 PM on Jan. 23, 2011