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Discussion in 'Incubating & Hatching Eggs' started by LaurynRose, May 8, 2016.
What roles does humidity play in incubation?
Humidity is what controls how much and how fast your egg looses moisture. An egg needs to loose moisture (11-13% of it's weight) for the hatchling to hatch properly. If your humidity is too high the moisture in the air keeps the egg from being able to loose moisture and the air cell will not grow properly. It can also result in chicks growing too large and not being able to turn to the air cell at hatch time. Come time to hatch without the proper air cell they may not be able to pip into the air cell and they will drown in the excess fuid or they may pip into the air cell but because of excess fluid in the egg it may leak into the internal pip and the chick will aspirate on the fluid.
On the flip side if the humidity is too low the egg will loose too much moisture too fast and the air cell will grow too large and the membranes may dry and "shrink wrap" the hatchling preventing it from internally pipping at all or making progress if it is able to internally pip.
For more info you can read here: http://letsraisechickens.weebly.com...anuals-understanding-and-controlling-humidity
At hatch time humidity keeps the exposed membrane moist so that it does not dry up and stick to the chick glueing it and hindering it from progressing to zip.