What NICU Hospitals Should Know About Safety, Storage, and NEC Prevention
For premature infants with very low birth weight, human milk is a critical medical intervention. When a parent’s own milk is limited or unavailable, most hospitals rely on pasteurized donor human milk to support the baby’s growth, protect the gut and reduce severe complications such as necrotizing enterocolitis (NEC). NEC is a serious gastrointestinal condition that affects newborns, especially premature infants. Health authorities including the Centers for Disease Control and Prevention, the Food and Drug Administration and the American Academy of Pediatrics recognize that pasteurized donor human milk is a safe and effective alternative when mothers own milk is not available.
Mothers’ Milk Bank California (MMBCA) is committed to preserving the nutritional components of donor human milk, as well as the safety of donor human milk. Especially since MMBCA serves medically vulnerable infants, our protocols are stringent and intentionally more conservative than the minimum requirements. Every step in our process is designed to protect the quality, safety, and clinical reliability of the milk we provide to hospitals.
How MMBCA Ensures Safe, Reliable Donor Milk
At MMBCA, we follow stricter standards to make sure every step of our donor milk process is nutrient dense. This includes how we screen our donors and how we test, store and track every batch of milk. Below are a few ways MMBCA ensures that hospitals who dispense pasteurized donor milk can prescribe it with confidence to protect their smallest patients.
1. Rigorous screening and laboratory testing
Donors complete a detailed health and lifestyle review. This includes monitoring their alcohol intake, a questionnaire on medications they take that can pass into breast milk and blood tests for HIV, HTLV, hepatitis B, hepatitis C, and syphilis. Only donors who receive full medical clearance are approved to donate.
2. A shorter acceptance window for frozen milk
While the Human Milk Banking Association of North America (HMBANA) allows for frozen donor milk to be stored for up to twelve months, MMBCA uses a nine-month window. This reflects our established workflow and inventory-management practices. Both timeframes are recognized within the field.
3. Hospital grade and mature grade batching
Hospital-grade and mature-grade milk both undergo the same rigorous screening, testing, and pasteurization processes. The distinction reflects how milk is allocated based on infant needs. Milk designated for hospital use is prioritized for NICUs and typically meets specific criteria, such as a caloric density of 19 kcal per ounce or higher, at least three months of remaining shelf life, and stable, consistent nutritional composition across the pooled batch. Mature-grade milk is equally safe and carefully processed but is generally directed toward outpatient families whose babies no longer require intensive medical care.
4 Holder pasteurization and Public Health testing
All donated milk is pasteurized using the Holder method and tested right away. MMBCA partners with the Santa Clara Public Health Department to screen for pathogens. Only milk that meets all safety standards is approved for the babies who rely on donor milk.
5. The Story Behind Every Bottle
Every bottle we ship to hospitals comes with everything they need to understand exactly what’s inside. The label includes the batch number, caloric value, and an exact expiration date set according to the earliest pumping date in the batch. It also notes that the milk has been pasteurized and tested.
These details give hospitals a clear record of the milk’s history and confidence that every step has been carefully documented and verified.
Nutritional Benefits of Pasteurized Donor Human Milk
Studies continue to show that pasteurized donor milk provides benefits to babies including:
- Lower inflammation
- Better gut barrier support
- Smoother feeding tolerance
- Early immune development
- Lower NEC risk compared with formula
NEC prevention depends on reliable access to human milk and many other factors related to the baby’s development. However, donor milk remains a vital part of that care. Mothers’ Milk Bank California will keep reviewing new research, working with clinicians and strengthening our protocols, all while continuing the safe practices that have helped protect infants for decades.
If you have questions or would like to discuss recent research, our team is ready to support you at 408-998-4550.
References
American Academy of Pediatrics. (2022). Breastfeeding and the use of human milk (Policy Statement No. e2022057988). Pediatrics, 150(1).
https://publications.aap.org/pediatrics/article/150/1/e2022057988/188347/
Centers for Disease Control and Prevention. (2022). Breastfeeding report card, United States 2022. U.S. Department of Health and Human Services. https://www.cdc.gov/mmwr/volumes/71/wr/pdfs/mm7133a1-H.pdf
Human Milk Banking Association of North America. (2024). Standards for donor human milk banking. HMBANA. https://www.hmbana.org/file_download/inline/95a0362a-c9f4-4f15-b9ab-cf8cf7b7b866
Rodríguez-Camejo, C., Puyol, A., Arbildi, P., Sóñora, C., Fazio, L., Siré, G., & Hernández, A. (2023). Effects of human donor milk on gut barrier function and inflammation: In vitro study of the beneficial properties to the newborn. Frontiers in Immunology, 14, Article 1282144. https://pmc.ncbi.nlm.nih.gov/articles/PMC10663376/U.S. Food and Drug Administration. (2023). Use of donor human milk. U.S. Department of Health and Human Services. https://www.fda.gov/science-research/pediatrics/use-donor-human-milk
