Um, yeah, big fat lie! I've been a dental nurse for 10 years, and I've never come across that one! Sure, there are some anaesthetics that aren't used on pg women, but dentists usually have a least couple to choose from, they have to.

I wouldn't be waiting until the baby is here, if it's a deep filling you could run into problems later in your pg, and need ABs and all sorts. And have you heard the saying that it's easier to take a baby in utero to the dentist, rather than in a pram

Think about finding another dentist and getting the work done. And if you're really concerned about it, maybe wait until after the 12 week mark.