Dying fully formed

[Joshw1995]

Hello,
I am new to the group and am looking for advice and guidance on incubating chicken eggs.
Yesterday I finished incubating my cream legbar eggs but didn’t do as well as I wanted. Out of 25 fertile eggs I ended up hatching out 11. The other 14 was all fully formed but ended up dying without attempting to pip so I think they would have died at around day 19 or 20. I have a cheap Chinese incubator which might be the majority of the problem.
I had the temperature at 37.5 degrees Celsius all the way through and the humidity at 30 up to day 18 and then had it at 60 for lockdown.
Do you think I had done anything wrong? Any help I would welcome.

thanks.

 

[BirdsBeesTrees]

Were these your eggs or were they shipped? Shipped eggs have a 50% or less actual hatch rate.
If they were your eggs how long did you have them in storage before you started incubating them? What percent of protein in feed were you feeding your chickens?

 

[Joshw1995]

They wasn’t my eggs but was told that the oldest eggs that I was given was 3 days old when I collected them, they didn’t go through the postal system. I then sat the eggs for 24hours before incubating.
Would the eggs get to the fully form stage if the eggs were to fault or would it be more the incubator?

 

[BirdsBeesTrees]

They wasn’t my eggs but was told that the oldest eggs that I was given was 3 days old when I collected them, they didn’t go through the postal system. I then sat the eggs for 24hours before incubating.
Would the eggs get to the fully form stage if the eggs were to fault or would it be more the incubator?

It could be either. You need to do a process of elimination to find out what the problem is.
If you could get some other eggs and try to incubate them and the problem still happens then it's your incubator.
Or more expensively you could buy another incubator and incubate the same eggs and see if they do better.
Eggs quitting before the hatch can be a too high humidity problem or a nutrition problem. If they yolk doesn't have enough nutrients in it the chick would die. If they humidity is too high the chick is too big and can't hatch out.

 

[Joshw1995]

I have got some more eggs in at the moment only on day 1 although they are different breeds to last times but am going to get through the same process and see what the outcome is