Decaf hardly has any caffeine in it so you can drink pretty much as much as you want
I drink regular coffee but only a cup a day, decaf still has some caffeine in it believe it or not but it's fine
My sister drank regular coffee her whole pregnancy so I think decaf would be perfectly fine:)
Decay is perfectly fine, it's not technically caffeine free but it has a much much lower content. I wouldn't make it like the only drink you drink all day but I'd say drink up.
I'm curious too cuz I've been offering decaf my whole pregnancy so hope it helps