I have witnessed our silver/splash Swedish drake (26 weeks) do his thing with our blue Swedish duck/hen (29 weeks) twice in the last month. I do not know how successful he has been because the first time around I tried setting the eggs in the incubator to 0% fertility. I realize that it is getting to be that time of year that they should be slowing down or stopping if anything, but maybe the crisp air is bringing out something in the Swedes ? My honest question though: how long after the hen has been bred will it be before she will lay fertile eggs? I know with chickens it is supposed to be 2-3 days after the act, but I Googled, I BYC'd and Yahoo Answered this to no avail. There has got to be someone out there who knows better than I do, I hope??