GUIDE
Colostrum comes in tiny amounts on purpose. Your baby's stomach is the size of a cherry on day 1 — those teaspoons of golden milk are perfectly matched to what they need.
Everyone panics about the small volume. Here's why you shouldn't — and what colostrum is actually doing for your baby.
Almost every new breastfeeding parent has the same moment of panic: "There's barely anything coming out. How can this possibly be enough?"
It's enough. Here's why: your baby was born with extra fluid and glycogen (stored energy) specifically to bridge the gap between birth and full milk production. Their stomach on day 1 holds about 5-7 ml — roughly a teaspoon. Colostrum is produced in amounts that match this tiny capacity. You're not failing to produce enough. You're producing exactly the right amount for a stomach the size of a cherry.
Colostrum is also wildly different from mature milk. It's thick, golden, and sticky. It has more protein, more antibodies, more immune factors, and less fat per milliliter than the milk that comes later. What it lacks in volume, it more than makes up for in concentration. Every drop is doing heavy lifting.
| Day | Baby's Stomach Size | Colostrum per Feed | Total Daily Volume | Number of Feeds | What's Happening |
|---|---|---|---|---|---|
| Day 1 | Cherry (5-7 ml) | 2-10 ml (about 1-2 teaspoons) | ~30-50 ml total | 8-12+ | Those tiny drops? That's the plan. Baby's stomach literally cannot hold more. |
| Day 2 | Walnut (10-13 ml) | 5-15 ml | ~50-80 ml total | 8-12+ | Stomach is growing but still small. Frequent feeds are building your supply for what's next. |
| Day 3 | Ping pong ball (22-27 ml) | 15-30 ml | ~80-100+ ml total | 8-12+ | Milk is transitioning. Breasts may start feeling fuller. Colostrum mixes with early milk. |
| Days 4-5 | Egg (60-80 ml) | 30-60 ml | Increasing rapidly | 8-12 | Mature milk arriving. Volume increases noticeably. Baby should be gaining weight now. |
Colostrum isn't just food — it's your baby's first immune system download.
Colostrum is loaded with secretory IgA — an antibody that coats your baby's gut lining and acts as a first line of defense against pathogens. It also contains white blood cells, lactoferrin, and other immune factors. Think of colostrum as your baby's first vaccine, custom-made by your body based on the pathogens in your specific environment.
Your baby's gut is sterile at birth. Colostrum contains prebiotics and beneficial bacteria that begin colonizing baby's intestinal tract with the right microbiome. This early colonization affects immune development, digestion, and potentially long-term health.
Colostrum has a natural laxative effect that helps baby pass meconium — that thick, black, tar-like first stool. Clearing meconium is important because it helps eliminate bilirubin and reduces the risk of jaundice.
Colostrum helps stabilize your newborn's blood sugar in the first hours and days after birth. This is one reason why skin-to-skin and early feeding are encouraged immediately after delivery.
Colostrum has more protein and less fat than mature milk, and it's packed with vitamins A, K, and E. The lower volume is intentional — it lets baby practice the suck-swallow-breathe coordination without being overwhelmed by a high-volume flow.
If these describe your baby, colostrum is doing its job. The volume increases day by day, and your milk will be in soon.
These don't automatically mean supplementation is needed — but they do mean a conversation with your pediatrician. Early evaluation catches issues before they become crises.
tinylog lets you log feeds and diapers together, so when your pediatrician asks 'how many wet diapers today?' you've got the answer right there.
"Colostrum isn't enough — babies need formula in the first days." For most healthy, full-term newborns, colostrum alone is sufficient. The AAP, WHO, and ABM all recommend exclusive breastfeeding from birth, with supplementation reserved for specific medical indications (excessive weight loss >10%, hypoglycemia, jaundice, dehydration signs). The Academy of Breastfeeding Medicine's Protocol #3 outlines exactly when early supplementation is appropriate — and it's a shorter list than the formula marketing would suggest.
"You should be hand expressing colostrum into a spoon to make sure baby gets it." Hand expression after nursing can be helpful to collect colostrum for supplementation if baby is having trouble latching, but for a baby who is latching and swallowing at the breast, the colostrum is going directly where it needs to go. You don't need to add extra expression if feeds are going well.
"More colostrum is better." Not necessarily. Kent et al. (2006) documented significant variation in early milk volumes between individuals. A parent who produces 30 ml of colostrum per day and a parent who produces 100 ml per day can both have adequately fed babies. Volume varies; what matters is whether baby is meeting output markers.
"Colostrum production means your milk will come in fine." Colostrum is produced by a different hormonal mechanism (driven by progesterone withdrawal) than mature milk production (driven by prolactin and milk removal). Having colostrum doesn't guarantee abundant mature milk, and having low colostrum doesn't predict low supply. These are separate processes.
Some providers now recommend hand expressing and storing colostrum in the final weeks of pregnancy, especially for parents who may face early breastfeeding challenges — parents with diabetes, those planning a cesarean, or those carrying a baby with a known condition that might make early feeding difficult.
After 37 weeks in an uncomplicated pregnancy, gentle hand expression can be used to collect and freeze small amounts of colostrum in syringes. This stored colostrum can then be brought to the hospital as a supplement if needed, avoiding formula in the first hours if that's your preference.
This is not something to do without discussing with your provider first. Nipple stimulation can trigger contractions, so it's generally not recommended before 37 weeks or in pregnancies with certain complications.
See your pediatrician if: baby isn't meeting diaper counts, weight loss exceeds 10%, jaundice is present, or baby is too sleepy to feed. Your pediatrician will assess whether supplementation is needed and can do weighted feeds to check transfer.
See an IBCLC if: you can't express any colostrum, baby isn't latching despite attempts, or you want help with hand expression technique. Many hospitals have IBCLCs available in the first days — request a visit before discharge.
Know the difference: Colostrum concerns in the first 48-72 hours are common and usually resolve when milk comes in. But they do need monitoring. Don't wait for day 5 to get help with a day 2 concern.
This guide is for informational purposes only and is not a substitute for professional medical advice. If you're experiencing breastfeeding difficulties, consider consulting an IBCLC (International Board Certified Lactation Consultant) or your pediatrician.
