Bad Hatch Question

[jamespet]

I was hatching 24 eggs and 10 of them hatched. So when I opened the remaining eggs they had gone full term but never pipped or anything any one have any suggestions on what may have caused this?

 

[BawGock]

Sorry about your poor hatch rate.
What was your humidity at days 1-18?
Fully developed chicks that do not hatch is frequently caused by the humidity being too high during the first 18 days of incubation.
If the eggs dry down properly the air cells increase in size by quite a bit during incubation and the growing chick grows into the remaining space.
If the eggs do not dry down enough, the chicks will grow into the space not taken up by the air cell and grow too large to pip and hatch.
Also, on an egg that didn't dry down enough, the chick will pip the air cell and is met with a gush of fluid that drowns the chick in the egg.
Carolyn

 

[jamespet]

It ran at 46 to 49 percent. The eggs were quite full when I opened thembut didn't seem to have an excess of fluid.

 

[BawGock]

Then it sounds like the first example, just too big to move around in the egg and get into position to pip.
Next time around you might want to try to lower the humidity by 10% and candle at days 10 and 14 to really track the drying down process.
Carolyn