pfan nailed it pretty much, one thing that you have to remember in captivity is "natures calender" is no longer valid. we keep the perfect temps for them 24/7 so some breed when they do in the wild some do 3,4,5,6 months later. so just because your girl doent lay when you think she should keep putting males with her and shell go when shes ready. ive had girls lay in sept, may and june so far.