Chris,
Looking at my records the first breeding took place on 23MAR and again on the 28th of March (about 37-40 days). It's entirely possible that the colony mated several times with the two males I was using this year.
As for my bad luck I was/am way overdue. Actually couldn't have happened at a better time with my pending transfer. The only thing I can put my finger on that may have cuased the poor results are:
-Used a new male this time around (1st year breeder)
-Hibernation was not as cold and was shorten by two weeks
Other than that all breeding conditions were as normal.
Three clutches to go but definately I'm not double clutching this summer.
If my sonoran eggs turn out to be infertile, I've only got the hibernation issue to hang my hat on. On the positive side, VA gets pretty darn cold during the winter.
Russ