I'm a 34b as well, I can fit most of my bras still, mine have grown some, but not that much.

Mine grew but not a huge amount. I can still fit into the same cup size (34B) but they look a lot fuller

I'm usually 34B but now 36D

Mine didn't with my son until my milk came in. This pregnancy I've gone up a cup size and two number sizes 😩 perks of being pre-stretched I guess?

With my son they grew right away. I'm now 7 months pregnant with my daughter and no change. I'm scared about how big they will get when I nurse though due to already being a 36 D. :(

Mine have only gone up 1 size

Same here hahaha mine haven't grown at all.

Lol mine only got a little fuller, like rounder. My cup size is still a A cup lmao.

does it only go up when you breastfeed?

mine didn't grow until after I had my son then bam I went up like 3 cup sizes lol