Hatching egg length

[funonahonda]

Only one egg hatched at 21days where as the other eggs that are hatching now have been longer than 21 days, why is that?

 

[sourland]

Temperatures may vary throughout your incubator. Does it have an air circulator?

 

[funonahonda]

I didnt hatch them from a incubator two of my hens went broody and it took longer than 21 days for them to hatch.

 

[rosiethechicken]

The hatching depends on lot of things, including temperature. Hens don't control temperate uniformly like the incubator.
And if the temperatures outside are high enough, the eggs layed in the beginning of clutch may hatch earlier than
others in the batch.

 

[A.T. Hagan]

Twenty one days is the average incubation time for chicken eggs. They are subject to all the variables that the above posters have listed and more besides. Especially when a broody is going the hatching the actual hatch time can vary quite a lot. Be patient.