Hello...i too was advised not to wear underwire bras during pregnancy due to milkduct problems, at 16 weeks i gave in and went to david jones and was fitted for maternity bras - i did look at getting fitted for normal bras but no wire but they were more expensive than maternity bras with only 3 notches instead of 6 so went for the maternity. The best thing i ever did - so much more comfotable - and way more support than i ever though you could get from a non underwire bra. I normally vary from a 14 B to a 16 C depending on the bra. I was fitted for a 16 C on the smallest notch so there's room to grow. Once properly fitted i then went to target and got anther bra that was a lot cheaper but fits just as well as the more expensive one. This was only 3 weeks ago and so far so good, still fits wonderfully on smallest notch. Good luck with whatever you decide to do - i'd advise maternity bra, no wire.