Keep this in mind, and allow for room to grow when buying a new bra. (babycenter.com)
Most of us will need to buy a new bra during pregnancy but it is likely that your cup and band size may change after pregnancy as well. (breastfeedingneeds.com)
And buy new bras frequently because wearing them every day 24/7 wears those bad boys out quicker than nothing. (simplymombailey.com)