I'm just over 6 weeks pg and already at 4 boob stage. I'm a Bravissimo convert so fairly sure my pre-pregnancy size of 30F or FF was correct and this generally means expensive bras. I have awful visions of buying new bras every 2 weeks for next 9 months! Any tips on what stages to expect growth spurts in that area and also what types of bra might be most forgiving so that I don't have to keep changing would be good. Also, I realise back size changes too, anyone know when that happens? Thanks in advance!