For premature infants whose mothers cannot produce enough breast milk in the first weeks of life, pasteurized donor human milk is the recommended alternative to cow's-milk-based formula. The evidence behind that recommendation is robust enough that the American Academy of Pediatrics, the World Health Organization, and most major neonatology societies endorse it. The question, in any individual case, is whether donor milk was actually offered and used — or whether the hospital reached for cow's-milk-based formula despite the documented risk.
What the Research Shows
A consistent body of research over the last two decades has demonstrated that premature infants fed an exclusively human milk diet — their mother's own milk plus donor milk when needed — have substantially lower NEC rates than infants fed cow's-milk-based formula. Major findings:
- Cochrane systematic reviews have concluded that formula feeding (compared to donor breast milk) increases the risk of NEC and "near-NEC" feeding intolerance episodes in preterm infants.
- Multiple randomized controlled trials comparing donor milk-supplemented diets to formula-supplemented diets in NICU populations have found significantly lower rates of NEC and NEC-related surgery in the donor milk groups.
- Observational studies in NICUs that converted to exclusive human milk diets have documented sharp drops in NEC incidence after the transition — in some published series, more than a 50% reduction.
- Biological plausibility reinforces the epidemiology: human milk contains immunoglobulins, oligosaccharides, growth factors, and live cells that protect the preterm gut. Cow's milk does not.
The AAP Recommendation
The American Academy of Pediatrics (AAP) recommends that, when mother's own milk is unavailable or insufficient, pasteurized donor human milk should be the preferred alternative for very-low-birth-weight infants — the population at highest risk for NEC. The recommendation appears in successive AAP policy statements and is referenced in joint statements with the American Academy of Family Physicians and the World Health Organization.
The recommendation is not absolute. AAP guidance acknowledges that some NICUs do not have access to a donor milk program, that some families decline donor milk for personal reasons, and that there are clinical contexts in which formula is acceptable. But the default for the highest-risk premature population — particularly babies under 1500 grams — is human milk.
How Donor Milk Programs Work
The donor milk supplied to NICUs comes from accredited milk banks — the Human Milk Banking Association of North America (HMBANA) and similar organizations elsewhere. The process:
- Donors are screened with health histories and blood tests, similar to blood donation.
- Milk is collected, frozen, and shipped to the bank.
- At the bank, milk is pooled from multiple donors, pasteurized using a specific temperature-time protocol (Holder pasteurization), and tested for bacterial contamination.
- Pasteurized donor milk is shipped to participating hospitals.
- NICU pharmacy or feeding teams distribute it according to physician orders.
Pasteurization reduces some of the bioactive content of fresh breast milk but preserves the core protective factors. Pasteurized donor milk remains substantially superior to cow's-milk-based formula for preterm infants.
The Gap Between Guidelines and Practice
Despite the evidence and the AAP recommendation, many U.S. NICUs continue to use cow's-milk-based formula as the default supplement when mother's own milk is unavailable. Some of the reasons NICUs give:
- Cost. Donor milk is more expensive per ounce than formula, and not all states require Medicaid or private insurance to cover it.
- Logistics. Smaller NICUs may not have established donor milk programs.
- Workflow. Donor milk requires specific handling, thawing, and administration protocols that staff need training to implement.
- Tradition. Some NICUs simply default to the formula they have used for years.
None of these reasons addresses the underlying medical evidence. From a malpractice perspective, the question is whether the standard of care — which is shaped by the AAP recommendation and the published evidence — required offering donor milk before defaulting to cow's-milk-based formula in a high-risk premature infant.
Why this matters in NEC cases. The product liability claims against Abbott (Similac) and Mead Johnson (Enfamil) focus on the manufacturers' alleged failure to warn about NEC risk. Hospital negligence claims, by contrast, focus on whether the NICU should have offered donor milk instead of formula in the first place. Some cases include both theories.
What to Look For in Your Baby's Records
If you are reviewing your premature baby's NICU records to understand what happened, the donor milk question can be answered from a few specific places:
- Admission orders and feeding orders. What was the default feed when mother's own milk was not yet available?
- Donor milk consent forms. Was donor milk offered? Was it declined, accepted, or never discussed?
- Hospital policies. Did the NICU have a donor milk program? If not, why not? Did the policy require offering donor milk to high-risk babies?
- The feeding flow sheet. What was actually fed, in what proportions, over the relevant weeks?
- Consultation notes. Did anyone document the decision-making about formula versus donor milk?
Our companion guide on reading a NICU progress note covers how to find these entries in the chart.
If Your Baby Was Fed Formula Instead of Donor Milk
If your premature baby developed NEC after being fed cow's-milk-based formula — particularly if a donor milk program was available at the hospital and not used — the case may include both manufacturer product liability claims and hospital negligence claims. The free case review evaluates both tracks.
- See if your case profile fits: Do I qualify for an NEC lawsuit?
- Understand the formula-NEC science: Why cow's-milk-based formula causes NEC.
- Read about hospital negligence claims: NEC hospital negligence.
- Check the current litigation status: NEC MDL June 2026 Update.
Free case review. No Fees Unless We Recover Money for You.
Sources
- American Academy of Pediatrics — "Donor Human Milk for the High-Risk Infant: Preparation, Safety, and Usage Options in the United States" (policy statement). publications.aap.org
- Cochrane Database of Systematic Reviews — "Formula versus donor breast milk for feeding preterm or low birth weight infants." cochranelibrary.com
- Human Milk Banking Association of North America (HMBANA) — Standards and processes for donor milk banking. hmbana.org
- World Health Organization — "Donor human milk for low-birth-weight infants." who.int
- NIH/NICHD — Neonatal Research Network outcome data on human milk feeding and NEC. neonatal.rti.org
- National Library of Medicine / PMC — peer-reviewed studies on donor milk and NEC incidence. ncbi.nlm.nih.gov