Can I expect ducklings from my Muscovy Duck's first laid eggs?

[Functional Rustic]

I have a Muscovy hen that is about 6 or 7 months old and is sitting on a clutch of at least 15 eggs. These are the first eggs she has laid. She has been sitting on them non stop for about a week now. It is between 10 and 20 degrees in the barn - just above zero outside. Will these eggs be fertile and produce ducklings?

 

[chickens really]

Do you have a Drake?