My SIL is exclusivly pumping for her baby girl while she's in the NICU (baby was born at 28wks) Yesterday, she called to ask me how long bm can sit out because she'd accidently left some on the counter. I never pumped (well I did to relive engorgment a couple times, but it was very rare cause my kid would never drink it) but I thought I had read it was either 4 or 8 hours. So how long is it? Her milk was only out for 2 hours, so I'm pretty sure it's fine, but I want to tell her the real number so she doesn't worry.
Here are some websites that might be helpful:
FWIW, I left mine out routinely for 8 hours, and my kid still has all his major body parts.
maxmama, the NICU currently has enough breastmilk so it's all going into her freezer now. She has a huge supply built up in her freezer so this milk will be not be used until everything else has. I'm surprised the LC didn't mention it honestly and I had to tell her.