When to stop turning Duck eggs

I have a question in reference to stop turning duck eggs.  I always have stopped at day 18-20, but looking into it further that was pertaining to chickens.  Although I have been successful in hatching ducks. This last batch seems like they are slow at progressing. They are alive, but I see more veins and its now day 22. Did I hurt it by taking it off the turner?  It was only for a few days?

OK, first off, are these a Pekin variety duck (Khaki, Indian Runner etc etc.)? If yes, they tend to hatch at 28 days.
The reason ducks/you turn eggs is to stop the duckling from sticking to the membrane. There is some risk that harm came from the short period with the turner off, but there's really no way to tell until you see duckling movement further along.
At this point all you can do is watch and wait.

If they're Muscovy ducklings, they take even longer - 35 days. I've got a mom who insisted on going broody a few days ago and we've had freezing temps this week. She looks like a Princess on a bed of fluff and happy as a can be, but it could be fun if she hatches and it snows!

We can't always control outcomes - try to be patient and plan for the best. Even if you've lost some, it doesn't mean you've lost them all. Keep us posted!

They are Perkins Ducks only. Thank you so much for the information. I put them back in the turner until day 25, like it says on the internet. I was worried I hurt them by taking them off. The eggs just didn't seemed like they were progressing like they should for it to be 22 days into incubation. We enjoy them so much and hatching process. I hope we can continue through the winter time.  Mom lays an egg everyday and they are always fertile.  The outcome is truly worth it all.  

Wendy Smith wrote:

The eggs just didn't seemed like they were progressing like they should for it to be 22 days into incubation.

Are you basing that on chicken development? Ducks are way slower - I had some hatch that I was sure were duds and hadn't internally pipped when they should and then all of a sudden I had 3 ducklings.

Hopefully the duckling is just hiding in the center of those arteries and doing just what it should.

I was basing it on the other ducklings I've hatched.  I've hatched about 8 so far.  Just didn't seem right, but maybe I'm over thinking it. They are due Sunday and hopefully they will hatch.  I'm in the North do perkins sell well in the winter.