Dear All, 


Here is another possibility, shared with permission 


Cindy 





We run across this at the Milk Bank sometimes, and did some research on it. There's a process called "nucleation", where clumps of particles (in this case, ice crystals) need something to form around. Apparently when we use sterile containers, there may not be those "somethings" (particles/impurities) for the ice crystals to form around. One suggestion we have gotten is to shake the milk once or twice and put it back in the freezer - apparently it might even freeze instantly as it comes in contact with a particle of "something". We do see that the milk is being stored at appropriately temperatures, so that meets our requirements in the short term... 


A non-technical explanation - I can get the more technical one if you need it, but that's how it was explained to me. Hope that helps! Happy New Year! 


Morgan Kennedy Henderson 
Donor Intake Coordinator 
Mothers' Milk Bank Northeast 

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