How long can hatching eggs be stored before they are incubated?
A rule of thumb is for each day eggs are held over 4 days, hatchability will drop 3-4% and hatching time will be delayed 30 minutes. Hatchability of eggs stored for long periods (over 7 days) can be improved by storing the eggs at 65°F in air tight plastic bags and turning the eggs once a day. Turning consists of placing one end of the case on a 2-3 inch board or brick one day, and the other end the next.
