It really depends on the temperature and humidity outside. An egg laid in a nest and not incubated by the hen could theoretically still be edible three or four days later if the ambient temperature was below 50F and above 32F. It is always best to discard eggs suspected to be older than 48 hours uncollected. At the very least they should be candled and given the float test.
26 hours between eggs is the usual.
The hen sits three weeks on it's eggs before it hatches
A disruption in routine can cause a slow down in egg production for as long as 10 days. Once the hens settle back in and find nesting boxes to their liking they will resume egg laying.
Fertile chicken eggs hatch in about 21 days, given warm temperatures and proper movement of the eggs by the hen. If you don't have a rooster in your flock, the hens won't lay fertile eggs and they'll just spoil.
Barn eggs are a term used for eggs found outside the regular nesting boxes and often cannot be determined how long ago they were laid by the hen. Some farms allow the hens to "free range" inside the barn on a farm where they are relatively protected from predators and sheltered from inclement weather. Most hens will lay their eggs in nesting boxes but sometime they will lay the egg in any old pile of hay or straw and are often not found for days or weeks after.
It can take 6 to 12 months before Barnevelder hens start to lay eggs. The exact time is different for each hen.
26 hours between eggs is the usual.
The hen sits three weeks on it's eggs before it hatches
As soon as the male serves the hens then the eggs should be fertilised.
42 weeks
As long as there is no rooster around to mate with the hens, you will not receive fertile eggs.
As long as no humans collect them or critters eat them, they are very safe if the hens can set on them as needed to hatch.
Roosters don't lay eggs. Hens do.
A disruption in routine can cause a slow down in egg production for as long as 10 days. Once the hens settle back in and find nesting boxes to their liking they will resume egg laying.
about a half hour
21 days from the first day conditions are optimum. A constant temperature of 100 F and a humidity of 60% are ideal. Hens will take up to a week to collect a clutch of eggs and then start brooding when enough eggs are collected. Hens will steal eggs laid by other hens to add to her clutch.
I'll tell you as soon as they've come out, someone told me about 20 days and one of our hens is sitting on her eggs now.