Quite possibly! Your breasts commonly change during pregnancy as your body prepares for your baby, and for many women this means their bra size changes too.
But there isn't a set amount that your breasts are expected to grow, and there's no particular week of pregnancy when you're guaranteed to need a new bra.
Every pregnancy - and every body - is different.
Why does your bra size change during pregnancy?
Hormonal changes during pregnancy cause your breasts to prepare for breastfeeding. You may notice that they become larger, fuller or more tender, and you may also notice changes to your nipples and areola.
For some women, the change is quite noticeable. For others, their breasts change very little.
You might find that your cup size changes, your band size changes, or both.
When will I need a bigger bra?
There's no need to change your bra size simply because you're pregnant.
Instead, pay attention to how your current bras feel.
It could be time for a new size if:
- Your breasts are spilling over the top or sides of the cups
- The band feels tight or uncomfortable
- The underwire is digging in
- Your straps are digging into your shoulders
- Your bra feels restrictive
- You're constantly adjusting it throughout the day
If your bra doesn't feel comfortable anymore, that's a much better indication that it's time for a change than the number of weeks you've been pregnant.
Will my bra size keep changing?
It might.
Your breasts can continue changing throughout pregnancy, so it's possible that a bra that fits perfectly in your first or second trimester may not feel quite right later on.
That's why it can be helpful to avoid buying a huge collection of bras in one size early in pregnancy.
Instead, look for maternity bras with adjustable straps, flexible fabrics and multiple hook-and-eye settings, giving you some room to adapt the fit as your body changes.
What about after pregnancy?
Your bra size may change again after your baby arrives, particularly if you're breastfeeding.
Your breasts can become fuller as milk production increases, so the size and fit that works during late pregnancy may not be exactly the same after birth.
If you're planning to breastfeed, having a couple of comfortable nursing bras ready before your baby arrives can be useful, but there's no need to buy a whole drawer full before you know how your body will change.
So, what size should I buy?
Don't try to predict exactly how much your breasts will grow.
Instead, buy for the body you have now, while choosing a style that gives you a little flexibility for the changes ahead.
If your current bra is becoming uncomfortable, it's probably time to look at maternity bras in a new size.
And remember - there is no “normal” amount to grow during pregnancy. Some women go up several sizes, while others notice only a small change.
The most important thing is that your bra fits comfortably and gives you the support you need.