I coloured my hair frequently during pregnancy... probably once a month. The reason I had to do it so much was because my hair wasnt holding the dye at all, it would wash out in the first couple of washes and I would be left with this dull orange colour which I couldnt go out in public with!! Plus my self esteem was quite low during my pg, so it was nice to be able to try and do something about my looks. All the research I did about it suggests that it was safe as the hair dye does not remain on the skin long enough to absorb through. But I have heard a few conflicting things about it since... but luckily everything turned out just fine with Aidyn