72+ hrs since first pip, how much longer?

[Gardencottager]

Humidity is not the number one cause of this. It is actually temps too low on average in the incubator.

The liquid and yolk are absorbed as the chick develops. Anything that hinders development will cause this.

Temperature needs to be in a 1 degree range-- 90f to 100f.

Humidity is in a 20 degree range from about 30% to 50% during incubation. Then up to 65% during hatching.

It seems counter intuitive doesn't it? but this is science and I have worked with some on BYC with this. One person did not believe me for more than a year. Then they bought a brinsea spot check thermometer and started having very good hatches

Thank you for that information I will keep it in mind for my next hatch. I did have the temp at 37.5 C which I think is the right equivalent to Fahrenheit, but maybe there were cooler spots or I should just run the next hatch half a degree warmer? Would opening to incubator to turn the eggs have affected the temperature too much? I’d read that is was ok because naturally the hen does get up to feed periodically.

Judging by the eggtopsies performed on some that didn’t hatch I do think the humidity was a little too high as well so I’ll try again with a fractionally warmer temp and a slightly lower humidity and hopefully that will help. Thanks

 

[ronott1]

Thank you for that information I will keep it in mind for my next hatch. I did have the temp at 37.5 C which I think is the right equivalent to Fahrenheit, but maybe there were cooler spots or I should just run the next hatch half a degree warmer? Would opening to incubator to turn the eggs have affected the temperature too much? I’d read that is was ok because naturally the hen does get up to feed periodically.

Judging by the eggtopsies performed on some that didn’t hatch I do think the humidity was a little too high as well so I’ll try again with a fractionally warmer temp and a slightly lower humidity and hopefully that will help. Thanks

The best thing is to use verify the temperature of the incubator using a calibrated thermometer. You don't need to calibrate a brinsea spot check thermometer