Air cell

[indigo flats]

Ok I am doing dry humidity incubation and after candling eggs at seven days the air cell appears to be to large. Does this hurt anything and if so what. I seen veins in five of the six eggs. My humidity has been between 20% and 35% I have not let it go below are above those two numbers.

 

[Yorkshire Coop]

Hi

If your air cell is too large for day 7 it means your eggs have lost too moisture so you will need to bump up the humidity to counteract this or by the time hatch time comes the air cell will be too large and the embryo could dehydrate.

DRY HATCH incubation DOES NOT MEAN RUN DRY! It is not only the final size of the air cell that matters, but also the time it takes to form. In the first ten days of incubation, the embryo is small and floats in the amniotic fluid. Weight loss during this phase is mainly the effect of water evaporating from albumen and internal liquids. After this stage, changes occur quickly: the growing embryo gradually fills the egg, excepting the air cell. Low RH set points at days 14-18 of incubation increase evaporation from the allantois – and once the allantois is emptied of fluid, moisture will be drawn from the embryo, causing its dehydration.

 

[indigo flats]

I increased the humidity to 40%