I would love to know the answer to this questions. I am 32 weeks pregnant with a boy and because I am so short wasted I am carrying him really high. I can almost FEEL my ribs being pushed out. I hope they go back because I had to buy bra extenders so they fit right!
You will feel better instantly. Breathing is much easier after you give birth, but I still wear bra extenders for certain bras. The real stretchy ones are good and the ones I use the extenders for are getting more comfy. I think it takes time for everything about your body to go back to where it was.