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If you’re a breastfeeding parent, you may be wondering if it’s safe to combine breast milk from different days. “Many factors affect the length of time milk can be safely stored, including cleanliness during expression and fluctuations in temperature of the storage location,” said Jenelle Ferry, M.D., neonatologist and director of feeding, nutrition and infant development at Pediatrix® Neonatology of Florida. Freshly pumped or expressed milk is safe for up to four hours or it can be safely stored in the refrigerator for four days or frozen. “In a freezer compartment inside a refrigerator (not a separate freezer), breast milk can be stored for two weeks; in a freezer that is separate but attached to a refrigerator and zero degrees Fahrenheit, six months; and in a deep freezer at -4 degrees, 12 months,” said Dr. Ferry.
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