I have read in the past that shouldn't dye hair while pg especially in first 3 months.
Recently, a hairdresser on TV said that although he wasn't a doctor he would recommend not to dye hair in early stages.
I have been dying my hair for years (my own natural colour to cover grey!) and have had it done twice at a hairdressers in 1st 3 months of pgncy and worrying a little now. I continued dyeing hair with ds1 but used a shop bought dye that didn't contain ammonia.
Some say use herbal dyes, others say use ones without ammonia
any comments?