A one-off flight (or a return trip) is fine - it is only if you are flying a lot that it can be a problem. A friend of mine is a hostess and they have to inform the airline as soon as they start TTC so they can be taken off active air duty and put in a desk job.

Apparently the pressure changes and different radiation levels are bad if you are constantly exposed, as a hostie would be.

But for everyone else it is fine.

I'm heading off to Queensland in two weeks and I can't wait! I'll be 29 weeks by then.