My ducks aren't prolific layers but I do get the occasional egg and this morning there were 2. They girls don't seem to show any interest in sitting on the eggs so I take them away and eat them. But now I am wondering, if I had an incubator, would future eggs be likely to hatch?
They wouldn't start sitting until they had about 10 days worth collected up in their nest surely?
The only duck we've ever kept is Muscovies and they loved to go broody and hatch large clutches of eggs - which nearly always turned out to be mostly male

Sometimes they would disappear for so long we thought the fox had got them, then they would wander out of the undergrowth with a gaggle of ducklings in tow, or sometimes they would sit in a hen house.
An advantage of using a live duck instead of an incubator is that you don't have to worry about moisture - the ducks regulate that themselves.
We used to have one or two infertile eggs with each sitting and we would remove those as soon as we could see (hear) that they were going off.
A duck also knows how long to sit for. It's longer than a hen, so I've wondered if hens used to incubate duck eggs would give up too early. The poor hen must also surely suffer several heart attacks a day when her 'chicks' jump in the water
