Confused about humidity - please help

[bargain]

I've ready so many articles and I'm confused.

What is the recommended humidity - first 18 days for a chicken (I have a round hygrometer I bought to put in the styrofoam incubator.

And also for the last 3 days.

My incubator has no fan and is a very old styrofoam one. Thanks.

 

[MissPrissy]

Chicken Eggs -

Day 1 - 18 = 40 - 45% humidity.

Day 19 - hatch = 70% humidity.

In a still air incubator test the temperature at the top of the eggs and make sure it is no higher than 101 - 102F - actually no higher than 101.5 is better.