i had a couple (about 10) before DD but as soon as i hit 7 months pregnant with her my hair started to turn grey, like 30% of my head! the hair wasnt brittle or anything, it was just colourless! like a month after birth (when i could actually be botherd doing my hair and thinking about finally giving into the hair dye) i noticed that the grey hair was growing brown again! like just over an inch and a half was brown again so i left it q few months and then just got a short hair cut, so yours could grow back too!
mine didnt last long tho, once DD was 1ish the greys started coming back, proper grey like dry brittle granny greys lol! i started getting my pregnancy greys 2 months ago too, so now my head is about 40% (if not more!) grey! and im only 21! i think once baby is out il be giving into the hair dye
xxxxxx
(ETA) I would put a dye through it now, i know im allowed, but i like not having to bother at the minute because who is going to say anything about the pregnant woman haha! xx