There's no set week of pregnancy when you suddenly need to start wearing a maternity bra.
For some women, their usual bras become uncomfortable quite early in pregnancy. For others, they continue wearing their normal bras for several months before needing to make a change.
The best time to start wearing a maternity bra is when your current bras no longer feel comfortable or give you the support you need.
What are the signs you need a maternity bra?
Your body can change quite quickly during pregnancy, particularly around your breasts.
You might notice that:
- Your bra band feels tight around your ribs
- Your cups feel too small or your breasts are spilling out
- Your bra is digging into your shoulders
- The underwire feels uncomfortable
- Your breasts feel more sensitive than usual
- You're constantly adjusting your bra throughout the day
- Your usual bras simply don't feel as comfortable as they used to
If you're experiencing any of these, it may be time to look at a maternity bra.
You don't need to wait until your bra is completely unbearable.
If something feels uncomfortable, that's usually a good enough reason to find something that fits better.
When do breasts start changing during pregnancy?
Breast changes can happen surprisingly early in pregnancy.
Hormonal changes can cause your breasts to become larger, fuller and more sensitive, and you may notice that your usual bra starts feeling different even before you have a noticeable bump.
However, everyone's pregnancy is different.
Some women go up a cup size quite quickly, while others notice only gradual changes. There's no particular point in pregnancy when you're expected to need a new bra.
Your own comfort and fit are much more useful guides than a particular week of pregnancy.
Should I buy a maternity bra in my first trimester?
You can if you need one.
If your normal bras are already feeling tight or uncomfortable during the first trimester, there's no reason to struggle through it until later in pregnancy.
You might not need a whole new collection at this stage, though.
Buying one or two comfortable maternity bras to start with can be a good way to see what you like and how your body changes.
You can always buy more or change size later.
How much can your bra size change during pregnancy?
There's no standard amount that everyone's breasts will grow during pregnancy.
You might notice a change in your cup size, your band size, or both. Your ribcage can also change as your pregnancy progresses.
This is why it's better not to buy a large number of bras based on the assumption that you'll stay the same size throughout pregnancy.
Instead, look for bras with:
- Adjustable straps
- Multiple hook-and-eye settings
- Flexible fabrics
- A comfortable, supportive band
- Room to accommodate some changes in size
Do maternity bras come in different styles?
Yes — maternity bras aren't all the same.
You can find:
Wireless maternity bras
These are popular during pregnancy because they're often soft, flexible and comfortable.
They're particularly appealing if your breasts have become more sensitive or you don't enjoy wearing underwire.
Underwired maternity bras
If you prefer the shape and support of an underwired bra, you don't necessarily have to give it up during pregnancy.
The important thing is that the bra fits properly and feels comfortable.
Nursing bras
Some nursing bras are suitable for wearing during pregnancy as well as after your baby arrives.
They usually have clips or fastenings that allow the cup to be opened for breastfeeding.
If you're planning to breastfeed, choosing a nursing bra towards the end of pregnancy can be a practical way to prepare for both stages.
What size maternity bra should I buy?
This is where things can get confusing.
Your maternity bra should fit comfortably now, rather than being bought several sizes too big in the hope that you'll grow into it.
Look for a comfortable fit around your ribcage, with your breasts fully contained within the cups and no digging or pinching.
A bra with adjustable fastenings gives you some flexibility as your body changes.
If you're unsure about your size, getting professionally fitted can be really helpful.
Do I need maternity bras if I'm not breastfeeding?
No.
Maternity bras aren't just for women who plan to breastfeed.
They're designed to provide comfort and support while your body is changing during pregnancy.
If you're not planning to breastfeed, you can simply choose maternity bras that suit your preferences and give you the comfort and support you need.
How many maternity bras should I buy?
You don't need to replace your entire lingerie drawer straight away.
Starting with 2–3 maternity bras is usually plenty.
That gives you enough for everyday wear and washing without committing to a large collection before you know which styles and sizes work best for you.
You can always add more later if you find a bra you love.
What about after the baby arrives?
It's worth remembering that your breasts can change again after birth.
If you're planning to breastfeed, you may want to have a couple of nursing bras ready before your baby arrives.
However, there's no need to buy a huge collection of one size in advance. Your breasts may change again in the early days after birth as your milk comes in.
A few comfortable, flexible bras are a good starting point.
So, when should you start wearing maternity bras?
Whenever your normal bras stop feeling comfortable.
It might be during your first trimester. It might be halfway through your pregnancy. It might not be until much later.
There's no right or wrong time.
Your body is changing, and your lingerie should change with it.
Don't wait until your bra is digging in, pinching or making you uncomfortable all day. If your current bras aren't working for you anymore, it's time to find something that does.
Comfort comes first.
More maternity bra advice
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