Humidity & Natural Hatching

[Bikergrl]

I see everyone referring to humidity in relation to hatching and incubators. I'm doing my first natural hatch with a broody (today is hatch day).So I'm wondering - how is humidity controlled during a natural hatch? I'm not too concerned - we live in a naturally humid environment, but I'm wondering if it's so important in an incubator isn't it equally important with a natural hatch?