Noticing a small, sticky wetness on your bra during pregnancy can be startling the first time — but it's almost always colostrum, and it's a sign your body is doing exactly what it's supposed to. The short answer: a small amount with no pain is normal, and your breasts have been preparing for this since the second trimester.
What it usually is
What you're seeing is colostrum — the thick, sticky, clear-to-yellow-to-milky first milk your body makes. Your breasts begin preparing for breastfeeding from the second trimester onward, well before delivery, so some women notice this leaking weeks or even months before their due date. Others notice very little or none at all, and that's equally normal — it doesn't predict anything about your milk supply later.
When it's normal
- A small amount is involved, not a constant or heavy flow
- There's no pain accompanying it
- The colour is the expected clear, yellowish or milky shade
When to get it checked
Get it looked at if the leaking comes with any of the following:
- Blood in the discharge
- A foul smell
- Redness of the breast or nipple
- Very painful, rather than just a sensation
- One-sided, with a lump you can feel underneath
- Fever alongside any of the above
Small amount, no pain, usual colour — normal. Blood, smell, pain, a lump or fever — get it checked.
What helps in the meantime
- Don't squeeze or try to express it deliberately — this doesn't help and can just increase irritation
- Wear a cotton bra that's breathable and comfortable
- Use breast pads inside your bra to manage the leaking discreetly, changing them when damp
Frequently asked
Does leaking colostrum early mean I'll have a good milk supply later?
No — how much you leak before delivery doesn't predict your milk supply afterward. Some women leak a lot and others none at all, and both go on to breastfeed without issue.
From what week of pregnancy can this start?
It varies widely, but breast preparation for milk production begins from the second trimester, so some leaking from mid-pregnancy onward is within the normal range.
Is it safe to collect and freeze the colostrum I leak before delivery?
This is a personal and clinical decision some women explore (antenatal colostrum harvesting) — discuss it with your doctor before attempting it, since timing and technique matter.
I'm leaking from only one side — is that itself a concern?
One-sided leaking alone, without a lump, pain, blood or fever, usually isn't a concern on its own — but combined with any of those other signs, it's exactly the pattern worth getting checked.
If what you're noticing doesn't fit the normal pattern above, don't wait it out — a same-day call to your doctor is the right move when blood, a lump, fever or significant pain is involved.