The only thing I have heard from hairdressers regarding perms during pregnancy
and lactation is that due to hormonal changes (which I don't have the
slightest) that affect hair folicles a perm may not "take" and so sometimes a
hairdresser will not guarantee the successful outcome of a perm under those
circumstances. Never heard of any possible ill affects to baby though.
Gretchen Andrews, BA, LLLL, IBCLC
private practice, Redlands, CA