If female keep sperm for next year, then..?

[WoWo]

If they really do, it means if I breed them with a new male, I may not get the results I expected (older sperm being used instead of the new one)..?

 

[indyana]

It is very unlikely, as the newer sperm will outcompete the sperm from last year to fertilize the eggs. I've heard no reports of a female producing offspring from last year's mating, although all breeders keep it in the back of their mind as a possibility.

 

[DrCarrotTail]

I've heard of females retaining sperm for up to 18 months and laying eggs that could not have been from the new male they were paired with because of a specific gene that was in the 1st male but not the second. It happens much more often with cold species like cresteds. Most leos don't keep sperm over the winter but it is a slight risk. If you're breeding to a significantly different male - like two different albino strains - I might five her a year off in between just to be 100% sure. If the males are similar where it won't be a huge issue if you get something wrong - like het tremper vs. het raptor or something, I probably wouldn't worry as much.