Duck egg question

[bradybrady09]

Here is my question how long can the hens stay fertile without a drake i just recently got a new drake but before that they were without for almost 2 months and when i break open the egg some have blood spots and most of them have the bullseye is there any way possible that they are still fertile?? im confused

 

[katrinag]

How long have you had the new drake? I think 4 weeks is about avarage for length of fertility.

 

[bradybrady09]

i have only had the new drake 2 days so i dont think its because of him yet