How long until baby goslings start forming inside the egg?

[RURU]

The blob at the top is the egg yolk... If they were fertile there would be veins and a spider looking thing right in the middle and the veins would be all over the egg.

Go here and this will help you.
https://www.backyardchickens.com/t/491013/goose-incubation-hatching-guide-completed

 

[seminolewind]

OMG!!! That's happened twice to me this past year. Polish laid eggs, silkie moved them under herself. But she sat there all the time! By the time I realized it, the first time they were at about 10 days, this last time, hatched 4 days after I saw the egg! OOPS! So I didn't murder them either!