Is this normal for a developing egg?

[happychickies101]

I really don’t know what to think. I am really confused on what this is.. we have 8 duck eggs in the incubator and 6 or 7 of them have weird spots in them(some look different than others) they move as the embryo does. We are currently on day 19 and will attach images. I’d you’ve ever incubated eggs please help!

 

[house.of.ducks]

I really don’t know what to think. I am really confused on what this is.. we have 8 duck eggs in the incubator and 6 or 7 of them have weird spots in them(some look different than others) they move as the embryo does. We are currently on day 19 and will attach images. I’d you’ve ever incubated eggs please help! View attachment 1346147View attachment 1346148

I’m pretty sure this is completely normal

 

[8 Chicks 1967]

yep good sign. Congrats

 

[happychickies101]

yep good sign. Congrats

8/8 healthy ducklings have hatched!!

 

[house.of.ducks]

Congratulations!!