Clear colostrum is absolutely worth collecting. Color has no bearing on whether colostrum contains the immune factors and nutrients your baby needs. Colostrum can range from deep yellow to completely clear and watery, and both versions are normal, functional first milk.
Why Some Colostrum Looks Clear
The golden-yellow color most people associate with colostrum comes from beta-carotene, the same pigment found in carrots and sweet potatoes. When colostrum appears clear instead, it simply contains less of this pigment and a higher ratio of sugar (lactose) to fat. The immune components, growth factors, and proteins that make colostrum valuable are still present regardless of color.
Think of it like olive oil: extra virgin is deep green while lighter varieties are nearly colorless, but both are still olive oil. Your body doesn’t produce a “defective” version of colostrum just because it lacks the yellow tint.
How Much to Expect Per Session
Colostrum comes in very small quantities, and this catches many people off guard. In the first day after birth, the average volume from a single hand expression session is about 4.7 mL, roughly one teaspoon. By day two that climbs to around 9 mL, and by day three it reaches about 22 mL per session. If you’re collecting before birth (antenatal expression), expect even smaller amounts, sometimes just a few drops per session.
These tiny volumes are normal and meaningful. A newborn’s stomach on day one holds only about 5 to 7 mL, so even a partial syringe of colostrum can be a full feeding. This is why hospitals provide small syringes rather than bottles for colostrum collection. Don’t judge the value of what you’ve collected by how little it looks in the container.
Who Benefits Most From Collecting Early
Any pregnant person can benefit from having colostrum stored and ready, but it’s especially useful in a few situations:
- Gestational or pre-existing diabetes: This is the group with the strongest evidence behind early collection. Babies born to mothers with diabetes are more prone to low blood sugar after birth, and colostrum has been shown to stabilize newborn blood glucose more effectively than infant formula. Women with diabetes also sometimes experience a delay in their milk coming in, making a stored supply particularly helpful.
- Planned cesarean or induction: If you know your birth date in advance, having colostrum on hand means your baby has access to your milk immediately, even if skin-to-skin feeding is delayed.
- Expected NICU stay: Babies with known heart conditions, cleft palate, or other issues that may complicate early feeding benefit from having colostrum available from the start.
- Previous difficulty breastfeeding: If a prior birth involved supply challenges or latching problems, a frozen stash of colostrum offers a safety net during those first critical days.
Is It Safe to Collect Before Birth?
The main concern about expressing colostrum during pregnancy has been whether nipple stimulation could trigger preterm labor, since the body releases oxytocin during hand expression and synthetic oxytocin is used medically to induce labor. Multiple clinical trials have now addressed this directly.
The Express-MOM study, a randomized controlled trial of healthy first-time mothers who began hand expression at 34 weeks, found no difference in gestational age at birth between the expression group and the control group. The median delivery date was virtually identical: 40 weeks and 1 day versus 40 weeks and 2 days. No adverse events related to hand expression were observed. The larger DAME trial in Australia, which focused on women with diabetes, also confirmed that antenatal expression did not increase rates of preterm birth.
In the Express-MOM study, one participant reported increased Braxton Hicks contractions a few days after starting, paused collection, was examined, and no issues were found. She resumed and delivered at full term. The two preterm births in the study group were caused by unrelated complications.
Most providers recommend starting at 36 or 37 weeks for low-risk pregnancies. If you have a history of preterm labor, cervical insufficiency, or placenta previa, check with your provider before starting.
How to Store Collected Colostrum
Colostrum follows the same storage guidelines as expressed breast milk. At room temperature (77°F or cooler), it stays safe for up to 4 hours. In the refrigerator, it lasts up to 4 days. In the freezer, it keeps for about 6 months at best quality, and up to 12 months acceptably.
Since you’ll be collecting very small amounts, most people express directly into 1 mL or 3 mL oral syringes, cap them, label with the date, and freeze immediately. If you collect multiple small syringes over several sessions, you can store them together in a small sealed bag. Freezing right away is the safest approach for colostrum collected weeks before your due date, since you won’t be using it within four days.
How It’s Used After Birth
When the time comes, a midwife or nurse will pull your labeled syringes from the freezer and verify the details with you. The syringe gets warmed to room temperature, either by placing the bag in warm water or tucking it against your skin. Your baby can then be fed the colostrum directly from the syringe or from a small cup, both standard methods for newborn supplementation that avoid nipple confusion.
Even if breastfeeding goes smoothly from the start, stored colostrum isn’t wasted. It can supplement feedings during sleepy periods when your newborn isn’t latching well, or bridge any gap while you and your baby are learning together. Many parents describe the peace of mind alone as worth the effort of collecting, knowing that whatever happens during delivery, their baby has access to that first milk.