How long after mating will th eegss be fertile?

[K4zn4v3]

Does anyone know how long after mating the eggs will be fertile? Lets say the ducks mate on one day, for how many days after that will the days egg be fertile?

 

[lovin my birds]

I had a muscovy hen that after I bought her and brought her home she laid 15 eggs and 10 where fertile. That was from the day she got here till she went broody. One egg a day. So I am going to say that around a week maybe a little longer. Oh and all her eggs where from the muscovy male she was with before she came here. And yes all the babys are muscovy. She was seperate from my drakes when she got here and she went broody the day she and her sister where going to be put in with the others. So she stayed seperate.