I am now 21 weeks and my bust has grown from 32DD to a 34E.
This is fine, but when I went to get measured and buy a new bra in M&S the lady serving me was horrified when I said I wanted an underwired bra. Having been made to feel like I was trying to buy heroin, I promptly went to another shop and bought an underwired bra in my new size and it looks and feels fab.
I have one maternity bra from Mothercare and although it's in the right size I hate it because it's less comfortable and a lot less flattering than my 'normal' new underwired one. I always wore underwired before being pregnant because of the fit and support.
My midwife said badly fitting underwired bras can damage breast tissue, but mine fits fine. I do want to breastfeed when baby arrives - surely I'm not doing any harm to my future milking equipment?