How long will unwanted male duck sperm stay in a female duck?

[Albert the Saxony]

I have multiple breeds of ducks that live together, but I plan on separating them by their breed, that way I’ll hopefully get true duckings of each breed. The problem is that I don’t know how long any unwanted male sperm will stay in the females eggs. Maybe 2 weeks or a little less? Thought I would ask the “eggsperts” out there. Thanks!

 

[nuthatched]

With chickens it can be up to a month, sometimes longer, I'm not sure about ducks.

 

[Magnolia Ducks]

About ten days to two weeks should be safe. You could have an outlier.

 

[HollowOfWisps]

Hatcheries consider after 18 days safe, but I wait a full 30.

 

[Albert the Saxony]

With chickens it can be up to a month, sometimes longer, I'm not sure about ducks.

Wow! That’s a bit longer than I had expected. I bet ducks would be pretty comparable to a chickens timeframe.

Thanks for your input!

 

[Albert the Saxony]

Thanks you guys! Sounds like a few different ideas on the exact amount of time, but it seems like I will definitely be in the clear if I wait 3-4 weeks.