How many cup sizes did you gain during pregnancy?

I'm a rare person who gained nothing at all. Started out as a 36C and ended up there too.

Our oldest daughter went from an A to a C though, LOL!

Long time ago, I was 36E before pregnancy and nothing changed during or after pregnancy and I breastfed for several months - I did gain a massive amount of weight around the belly and hips which took a long time to lose.

I went from a 36B to a 38DD. I did not gain any after birth. After I weaned the baby, I went back to a 36B.

Ha! I wish my breast size HAD increased during my pregnancy and then remained that way afterward. My breast size did not increase until about 5 days after I gave birth. They weren't supposed to do that because in those days we did not breast feed & they gave us tablets in the hospital to help prevent the production of milk.

Well! .. it looked great and I was well pleased with myself. For the first time in my life, I had high cleavage! That lasted for maybe 2 or 3 more days; then my boobs deflated to their normal size (34B, at the time), just like a pierced balloon!

It's completely individual. And it's more likely that your band size will change (pregnancy expands the rib cage) than your cup size changing significantly.

I only needed to change bra sizes with my fourth pregnancy. My daughter carried so high that my band size went from a 32 to a 36. It went back to a 34 after she was born, but that's as low as it'll go. Cup size stayed a G-H, depending on which brand.