Strange spots on egg

[rayann]

Hello all! I am letting one of my Broody hens hatch eggs. Two eggs have hatched so far, that were laid on Oct 18th. She has 3 left, that were laid on the 20th. Eggs came from various hens in my flock. I candled on day 8,9 and all looked good. I checked for movement in eggs by placing them in a glass of luke warm water on day 17 and all were still good.
One of the remaining eggs, has strange marks on it and I am wondering if it is still viable.
I took this pick on day 18, while broody was up eating.

 

[GitaBooks]

I've had eggs like that before. Its just some color spotting that happens during the development of the shell. It shouldn't affect the chicks or the hatching.

I hope the rest hatched well! : )