Everyone is different and every pregnancy is different. For both my pregnancies I went from a D cup to an H cup - and I didn't gain a whole lot of weight for either pregnancy. After my first pregnancy I went down to a D cup again no problem, after I stopped nursing, though. After my second pregnancy, at the same pre-pregnancy weight, I only went down to a DD. Not fair. I wanted to be one of those who deflated, to be honest. I hate hauling around big boobs! I waited a year and a half and then had a breast reduction, when it became apparent they weren't going to budge in size no matter how much weight I lost. My back and my shoulders thank me! :-)