if there is a air cell does that mean it is fertile

4 weeks? As in 28 days?

 

I'm thinking she means for a week.

At a week you should see some veining on the eggs.

 

The OP said they'd been in the incubator "for a week", translated from chatspeak.

Air cell doesn't mean fertility. It just means there was moisture loss from the egg. This is a normal part of egg development, they need to lose a certain amount. What you are looking for is signs of development. Veins should be visible now, bright red veins. You can also see a little embryo too, but sometimes it isn't very visible. The veins encircle the inside shell of the egg, though, and can very easily be seen.

 

heres a pic of an egg thats been in the bator for 7 days. u see veins and a small black dot that is the chick

 

If all you see is clear and an air cell...it's not fertile. Look for any veins or dark blobs...that means fertile.

 

I was wondering the same thing because I was given about 60 eggs and bought an incubator. Wishing I knew which ones to put in the Bator.

 

I now agree with @suebee after learning more.