So, I have my hair appt on Aug 5th. I took Letrozole this month and my body ovulated. I should be checking for a BFP a few days after my hair appt. After reading several posts on here about hair dying while pregnant, I'm concerned on whether I should dye my hair or not. I currently have a balyage going, so it would just be a root touch up, although I was wanting to her blond highlights again, but don't want to harm the possible fetus. Suggestions? Does the "danger" lie in breathing the fumes, or in the chemicals being absorbed by your scalp?