Long gap between hatching...

[Eddie]

Hi,

A couple of weeks back my first egg from a clutch of 8 hatched. Little Olaf. I had to wait a whole week before the second egg hatched. However 8 days have passed since the second one hatched, 15 days since the first. None of the others have hatched. I think two may have been infertile but the others I am sure are.

Is a gap of this long normal?

Yesterday it was 10 weeks since they were laid.

Is it likely the other eggs could still hatch?