Eggs didn’t hatch!

[AKhan31]

Hi,

I recently started incubating chicken eggs, in my first batch 6 out of 20 made it to lockdown stage then none of those 6 hatched!
2nd batch 14 out of 30 made it to lockdown then only 4 hatched on day 21-22 others all didn’t make even a pip and when I opened the eggs on day 24 only one of them it seemed that I killed (which I feel really bad for) others haven’t made it through.

Any ideas what I could have done wrong? the humidity was 50-55 percent for 18 days then 70-75 during the lockdown stage!

 

[007Sean]

Your humidity was too high during incubation. Should have be incubated at 35 to 45% RH for the 1st 18 days and increased to 60 -65% for 'lockdown' or the last 3 days of incubation.
What was your temperature during incubation? Do you have independent calibrated thermometers and hygrometers?
If you were using the incubators sensors they can be way off and are not reliable for accurate measurement of either temp or humidity.

 

[AKhan31]

Your humidity was too high during incubation. Should have be incubated at 35 to 45% RH for the 1st 18 days and increased to 60 -65% for 'lockdown' or the last 3 days of incubation.
What was your temperature during incubation? Do you have independent calibrated thermometers and hygrometers?
If you were using the incubators sensors they can be way off and are not reliable for accurate measurement of either temp or humidity.

Tnx for the response,

I set the temperature to 37.2 because I used 2 other thermometers which showed a little high temperature and no hygrometer.

And yes I will use 35-40 percent humidity next time.