Storage of Unfed and Leftover Mothers' Own Milk

Area of Science:

• Human milk analysis
• Microbiology
• Immunology

Background:

• Mothers' own milk is crucial for infant nutrition.
• Understanding the impact of storage on milk properties is essential.

Purpose of the Study:

• To assess bacteriological and immunological changes in human milk during storage.
• To compare freshly expressed, previously frozen, and leftover milk properties.

Main Methods:

• Two pilot studies involving mother-infant dyads.
• Storage of milk samples at various temperatures (24°C, 4°C, -20°C).
• Analysis of bacteriological and immunological markers post-storage.

Main Results:

• Human milk properties remained stable at 4°C for at least 6 days.
• Milk quality declined significantly when stored at 24°C for over 3 hours.
• Both freshly expressed and previously frozen milk showed similar storage stability.

Conclusions:

• Human milk may be safe for extended storage periods, but current guidelines require more research.
• Further studies are needed, especially on leftover human milk, with larger cohorts and real-world conditions.
• This research informs future study designs on unpasteurized human milk storage.