How long before breast milk spoils?

Several hours. Up to 8 hours at room temperature, but i would not suggest waiting that long to use it if you don't have to keep it out. 24 hours if you are using it from the refrigerator.
10 hours at room temp. 10 hours at room temp 1 week in the refrigerator 3-4 months in freezer (not a mini fridge with freezer inside).

Related Questions

How long can breast milk be frozen?

6 months. Refrigerated milk must be used within 24-48 hours, but properly frozen breast milk can be safely stored for up to 6 months. Read more...
6 months. In the back of the freezer or in a deep freeze with a consistent temperature, breast milk may remain good for up to 6 months. Avoid placing the milk in the door of the freezer as the temperature will not remain constant. Read more...

How long will it take to have good flow of breast milk?

Depends . Most will see milk come in by 3 days with a regular birth and 4 days with a c section. Better flow is a balance between infant latching/feeding position the supportive factors of rest & maternal nutrition. Read more...

How long can refrigerated breast milk stay out st room temperature for?

An hour or so. Breast milk is like regular milk with bacteria already infused. Most of those are "probiotics" so to speak, but some may be surface skin bacteria. So the milk will spoil faster than regular milk. After an hour or so being unrefrigerated, it should be discarded. Read more...
Brest milk. Breast milk that has not been fed on by the baby in a clean bottle with a clean nipple is probably ok for a couple of hours out of the refrigerator. However, once baby sips form the milk or nipple on the bottle at all, it is only then good for an hour. Read more...