there are a bunch of triggers that breeders like Kevin and Brian use to educe strong folicular growth
Brian often talks about
Temperature (the slight cool down in temp but not nearly as drastic as colubrid hibernation)
copulation
food
and sometimes time of year
there's one other I believe but off the top of my it escapes me.

at the end of the day take their wisdom along with may others here to find out what works best for your animals.