Duck egg air sac

[MallardMamma]

I just candled my eggs for the first time today, and noticed one of my eggs did not have a air sac. I went to Backyard chicken, and saw that some eggs have a air sac on the wrong side. Or I could have been wrong when I put it in the incubator, after all they are mallard eggs and some times there is not much of a difference. My question is, should the egg be alright if it spent the first week upside down?

 

[eggbert420]

Yes