If you have heard the term colostrum but are not entirely sure what it is or why everyone in the breastfeeding world talks about it, you are not alone. Colostrum is one of the most remarkable substances your body produces, and understanding it can change the way you approach those first days of feeding your baby. Here is everything you need to know.
What Is Colostrum?
Colostrum is the first form of milk your body produces, and it is present in your breasts well before your baby is born. It begins forming as early as the second trimester of pregnancy, which means by the time your baby arrives, your body is already ready to feed them. Colostrum is thick, sticky, and often golden or deep yellow in color, though it can also appear clear or white. It is produced in very small amounts, typically just a few teaspoons over the first day or two, which is exactly right for your newborn's stomach size at birth.
Around days 2 to 5 postpartum, colostrum gradually transitions to transitional milk and then to mature milk as volume increases significantly. This transition is sometimes called your milk "coming in," and it often coincides with feelings of fullness or engorgement in the breast.
What Makes Colostrum So Valuable?
Colostrum is often called liquid gold, and the nickname is well earned. It is extraordinarily dense in nutrients, antibodies, and immune-protective compounds relative to its small volume. Colostrum is rich in secretory IgA, a powerful antibody that coats your baby's digestive and respiratory tract and provides a protective barrier against bacteria and viruses in those vulnerable early days before their own immune system matures. It also contains high concentrations of white blood cells, lactoferrin, and growth factors that support the development of your baby's gut lining.
Beyond immune protection, colostrum acts as a gentle laxative that helps your baby pass meconium, their first dark stool, which is important for clearing bilirubin from the body and reducing the risk of jaundice. According to the Academy of Breastfeeding Medicine, early and exclusive breastfeeding that begins with colostrum is one of the most effective ways to meet the nutritional and metabolic needs of a healthy, full-term newborn.
How to Encourage Colostrum Production
Frequent feeding or expression is the most effective way to support colostrum production and transition smoothly to mature milk. The Academy of Breastfeeding Medicine recommends that newborns nurse 8 to 12 times in every 24-hour period, and that feeding begins as soon as possible after birth, ideally within the first hour. Skin-to-skin contact in the early hours after delivery stimulates oxytocin release, which supports milk flow and helps establish the feeding relationship.
If your baby is unable to nurse directly for any reason, hand expression is often more effective than a pump in the first days postpartum for collecting colostrum. Because the volumes are so small, even a few drops expressed into a spoon or syringe are meaningful. Once your milk transitions and volume increases, a high-quality double electric pump becomes a much more practical tool. Browse insurance-covered breast pumps on Storkpump to find a covered option before baby arrives.
Can You Collect Colostrum Before Birth?
Yes. Antenatal hand expression, the practice of collecting and storing colostrum during pregnancy, is supported by many lactation professionals and healthcare providers, particularly for moms who have a higher risk of low supply or whose babies may have difficulty feeding at birth, such as those with a diagnosed tongue tie, Down syndrome, or diabetic mothers whose babies may be at risk of low blood sugar. If you are interested in collecting colostrum before birth, speak with your OB or midwife first, as it is not recommended for everyone, particularly those with a history of preterm labor. A Storkpump IBCLC can also help you plan ahead. Contact us at askanIBCLC@storkpump.com.
What If Your Baby Is Not Getting Enough Colostrum?
Because colostrum is produced in such small amounts, many parents worry their baby is not getting enough. In most cases, the small volumes are entirely appropriate for a healthy full-term newborn. A baby's stomach on day one holds only about 5 to 7 milliliters per feeding, so even a small amount of colostrum goes a long way. The signs that feeding is going well in the early days include your baby rousing to feed regularly, audible swallowing during nursing, at least one wet diaper on day one with numbers increasing each day, and your baby returning to birth weight by around 2 weeks of age. If you have concerns about intake, a weight check with your pediatrician or a feeding assessment with an IBCLC is the most reliable way to get a clear picture. Visit the Storkpump about page to learn more about our IBCLC team.
Colostrum and Pumping
If you plan to pump, understanding colostrum helps set realistic expectations for your first few sessions. Output in the first days will be minimal regardless of pump quality or technique, and that is completely normal. A pump cannot improve on what your body is designed to produce at this stage. What matters most in those early days is frequency of removal, which protects your supply as it develops. Once your milk comes in and volume increases, having a well-fitted pump ready to go makes a meaningful difference. Use the Storkpump Flange Sizing Guide to confirm your correct flange size before your first pumping session, and visit the Learning Center for more guidance on early pumping.
Frequently Asked Questions
Is it normal for colostrum to be yellow or orange?
Yes. The golden or yellow color of colostrum comes from its high concentration of beta-carotene and other immune compounds. Color alone is not an indicator of quality or quantity. Colostrum can range from deep golden yellow to clear, and all variations are normal.
How long does colostrum last before mature milk comes in?
Colostrum is typically produced for the first 2 to 5 days after birth, at which point it transitions to transitional milk and then to mature milk over the following 10 to 14 days. The timeline varies by individual. Moms who had a cesarean birth or who experienced complications may find the transition takes slightly longer, which is another reason frequent nursing or pumping in the early days is so important.
Can I store colostrum I have expressed?
Yes. Expressed colostrum can be stored at room temperature for up to 4 hours, in the refrigerator for up to 4 days, and in the freezer for up to 6 months. Because volumes are so small in the early days, storing in a small syringe rather than a storage bag makes it easier to avoid waste. Visit the Storkpump FAQ for more guidance on milk storage and handling.
Will I make more milk if I pump colostrum early?
Frequent and early milk removal, whether through nursing or pumping, does support supply development. However, early pumping is not necessary or recommended for every mom. If your baby is nursing well and gaining weight, the nursing sessions alone provide all the stimulation your body needs in the early weeks. Pumping becomes important when direct feeding is not possible, when supply needs extra support, or when you are preparing to return to work. Browse insurance-covered pumps on Storkpump so you have the right pump ready when the time comes.
Sources
- Academy of Breastfeeding Medicine Protocol Committee. (2021). ABM Clinical Protocol #35: Supporting breastfeeding during maternal or child hospitalization. Breastfeeding Medicine. https://www.bfmed.org/assets/ABM%20protocol%2035%20Nov%202021.pdf
- Hoyt-Austin, A., Kair, L. R., Larson, I. A., et al. (2022). ABM Clinical Protocol #2: Guidelines for birth hospitalization discharge of breastfeeding dyads, revised 2022. Breastfeeding Medicine, 17(3), 197-206. https://doi.org/10.1089/bfm.2022.29203.aeh
- Centers for Disease Control and Prevention. (2026). About breastfeeding. https://www.cdc.gov/breastfeeding/php/about/index.html
Acreditado por ACHC