How long can Rouen Duck Eggs sit before being put in the bator?

[tink69]

I am getting some Rouen eggs from a neighbor and was wondering when I should have him start collecting them for me. I have 48 pheasant eggs in the bator at the moment for about 10 more days. So it will probably be at least 12 days before I could set them. Any help is appreciated.

 

[Wifezilla]

You will lose fertility after a week, but you should still get a descent hatch. Keep them cool (not cold) before you set them.