[gecko]Breeding Season (Leopard Geckos)

[SamRF2003]

Hi All,
I was wondering when the breeding season for leopard geckos ends? I haven't received anymore clutches from my female breeders since around May 5th. And I haven't seen them mate at all for a long while...so i suspect the mating season has been over for a while.
Also even if they don't mate still...doesn't a couple matings at the beginning of the season provide the females with enough sperm to lay eggs 'till around August? Why have mine stopped so early? They're around 50 grams or more and have been bred before with previous owners, and are a couple years old. Very healthy.
Any input would be great thanks!
-Sam