Your ribcage grows during pregnancy. But you probably already know that.
What you might not know: most maternity bras — even the expensive ones — aren't built for it.
So you reach for an extender. That small strip of fabric with extra hooks that clips onto the back of your bra, buying you a little more room. Handy, right?
Not really. Here's why.
Why your bra stops fitting in the first place
Your breasts change in two distinct phases during pregnancy — and most bras only account for one of them.
In the first trimester, your breasts grow primarily in cup size. Fuller, heavier, more sensitive. Your band size stays roughly the same. A standard maternity bra handles this fine.
Then, from around the second trimester, your ribcage starts to expand to make room for your baby. Your chest circumference increases by an average of 7 to 10 centimetres. That's two to three band sizes. This is where most bras stop working — and where the extender comes in.
But here's what nobody tells you: an extender doesn't just make the band bigger. It pulls the entire bra away from your body. The back rises. The cups get pushed forward and away from your chest. Instead of sitting against your breast tissue, they gap, dig in, or ride up. The support disappears exactly when you need it most.
What a bra extender actually does
An extender makes your bra one or two band sizes bigger. It temporarily fixes the circumference problem.
But your cup size is growing too. And an extender does nothing about that.
So by the time your ribcage has gone up a size, your cup is already too small again. The extender is still attached. And you're still uncomfortable — just now with a piece of fabric digging into your back, sitting crooked, or refusing to lie flat.
The five downsides of a bra extender
1. It's a temporary fix for a structural problem
Your body changes continuously throughout pregnancy. An extender might buy you two weeks. After that, the bra is too small again — in the cup, in the fit, or both.
2. An extender makes your cup fit worse, not better
A bra is engineered as one system — band and cup working together. When you extend the band, the whole construction shifts forward. The cups no longer sit flush against your breast tissue. They gap at the top, dig in underneath, or ride up entirely. For breasts that are already heavier and more sensitive than usual, that's not just uncomfortable. It's the kind of thing that makes you want to take your bra off by 10am.
3. You barely wear it
You buy the extender, use it for a few weeks, and then the bra is too small or too uncomfortable anyway. It ends up in a drawer. Not exactly a cost-effective or sustainable approach.
4. You keep buying
Most women end up buying 8 or more bras across all stages of early motherhood. Something for the first trimester when everything suddenly feels different. Something for the third trimester when your ribcage takes over. A couple of nursing bras when you decide to breastfeed. Something comfortable to sleep in. Something to bridge the gap until — hopefully, eventually — your old lingerie fits again. Every phase, another purchase. Every purchase, another reminder that nothing was built to go the whole way with you.
5. It doesn't look good
You're allowed to say that. A bra with an extender feels like a workaround. Because it is.
What women actually need
A bra that grows with them. Not just in the cup — but in the band too.
That sounds obvious. And yet it's surprisingly rare on the market. Most growing bras adapt in the cup, through stretch fabric or extra hook rows. But the band itself stays roughly the same size. Hence the extender.
What you actually need is a bra where the whole construction scales with your body — from your first trimester through your final feed. One bra. No extenders. No mid-pregnancy purchases. No hassle.
How Feelou solves this
The Feelou bra is the only maternity bra with a patented growing system that accommodates both cup and band size — without extenders, without add-ons.
Feelou comes in two versions, both designed to grow with you:
The Regular is made for women with an A–D cup before pregnancy, available in band sizes 70 to 90. The Big Cup is made for women with an E–G cup before pregnancy, available in band sizes 65 to 90. Both grow with you by 2 to 3 cup sizes and at least 10 cm in circumference. You size based on what you wore before pregnancy — no complicated measuring, no guesswork.
It also works as a nursing bra. Not as a compromise — actually. One bra from the first trimester to the last feed.
The fabric is TENCEL™ Modal: antibacterial, softer than cotton, and gentle on sensitive skin. Exactly what you want when your breasts are tender and sore.
And no — it doesn't look like a medical device. Because it doesn't have to.
What this means for you
- No more mid-pregnancy panic purchases
- No extenders digging into your back or sitting crooked
- No drawer full of bras that no longer fit after birth
- One bra that goes the whole journey with you
When do you need it?
As soon as your regular bra starts to feel tight — for most women, somewhere between week 6 and week 10. That's the moment to switch. Not later, because the longer you wait, the more you end up buying and throwing away in the meantime.
The bottom line
A bra extender is a strip of fabric with hooks. It doesn't solve anything. It buys you time.
You don't have time to waste on bras that don't fit.
