I am also curious about this. My pre pregnancy bra size is 38DD, I'm more like a 40DD right now but I'm cheap so I'm just wearing them on the widest hook setting.
I'm unsure what size nursing bra to purchase. I just want one or two to tide me over until the ladies have settled a bit and I will buy more then.
Are you supposed to buy one size up from your normal cup size? Any recommendations on nursing bras that give good support without underwires?