Duck Eggs Half White?! HELP

[LittleLakesFarm]

When I candle my 2 week old incubating duck eggs, half of the egg is white as shown in the image. It is not the air sac. I can see them moving around. I've never seen this half white-ness before.
The humidity was quite high for the first 2 weeks & I am working on lowering it now. Is it water inside the egg caused from the previously too high humidity percentage? Is this normal? Will they be okay?

 

[Pyxis]

That's normal. What you're seeing is the growth of the allantois. It hasn't yet grown enough to go around the whole egg, and that's normal at this stage of development.

 

[LittleLakesFarm]

That's normal. What you're seeing is the growth of the allantois. It hasn't yet grown enough to go around the whole egg, and that's normal at this stage of development.

Thank you!!!!!!