Fertilized Eggs?

[BuffyDuckies]

Hello, I cracked four eggs this morning and thought they were fertilized. My drake mates with my female and I have been expecting some fertile eggs and I think these might be. Im pretty sure they are all fertile. But I just want to make sure.
Also question about fertile eggs.
If my drake mates with my female today successfully and then let’s say the drake doesn’t mate with her anymore, will the eggs be fertilized just tomorrow or for longer? I can’t find an exact answer for it so might as well ask.

 

[JacinLarkwell]

They'll likely be fertile for a few weeks. These look like it, but I'm not 100 sure

 

[Tclloyd0812]

Hello, I cracked four eggs this morning and thought they were fertilized. My drake mates with my female and I have been expecting some fertile eggs and I think these might be. Im pretty sure they are all fertile. But I just want to make sure.
Also question about fertile eggs.
If my drake mates with my female today successfully and then let’s say the drake doesn’t mate with her anymore, will the eggs be fertilized just tomorrow or for longer? I can’t find an exact answer for it so might as well ask.

These look fertile as far as I can tell.
The sperm usually lives for up to 14 days so they can be fertile for up to 2 weeks after the first mating.

 

[humblehillsfarm]

They look fertile to me.

 

[Isadora]

Those are fertile. And yes, a duck that has mated recently should lay fertile eggs for a couple weeks, give or take.

 

[BabesDucks]

These look fertile as far as I can tell.
The sperm usually lives for up to 14 days so they can be fertile for up to 2 weeks after the first mating.

THANK YOU!

 

[BabesDucks]

Those are fertile. And yes, a duck that has mated recently should lay fertile eggs for a couple weeks, give or take.

How can you tell they are fertile? From the little white blob?