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Information about the author of this post.
awilliam's picture Azetta Beatty, MS
Work-Life Manager
College or Department
Work-Life and Well-Being
Scovell Hall
Phone Number
(859) 257-2648
Email Address

For breastfeeding and lactation support, you'll find several helpful resources from the Center for Disease Control and Prevention (CDC). As the national health protection agency, they provide guidance on lactation, proper storage of human milk including safe storage, safe thawing, feeding and cleaning pumping equipment.

We've provided the CDC's guidelines for quick reference:

Human Milk Storage Guidelines
  Storage Location and Temperatures
Type of Breast Milk Countertop
77°F (25°C) or colder
(room temperature)
40°F (4°C)
0°F (-18°C) or colder
Freshly Expressed or Pumped Up to 4 Hours Up to 4 Days Within 6 months is best
Up to 12 months is acceptable
Thawed, Previously Frozen 1–2 Hours Up to 1 Day
(24 hours)
NEVER refreeze human milk
after it has been thawed
Leftover from a Feeding
(baby did not finish the bottle)
Use within 2 hours after the baby is finished feeding

Table data from CDC proper storage of human milk

More about breastfeeding and lactation support at UK