One or both might have gone into a shed cycle. You can try a 2nd male in there with them, or (if you don't want to risk a mixed-sire clutch) putting the sperm plugs from a 2nd male on her back to make the 1st male THINK there's a 2nd male somewhere... but if neither thing works, let them have a break for a week or two. She still has to spend a month or two growing follicles, and I gather locks are most critical in the couple weeks before ovulation?

My pied female has gone into shed TWICE since I first tried introducing her to my male. Last time cycle took extra long because she was hanging out on the cool side hugging the water bowl. But that means building, I guess, and she's locked up with him right now. So it's all good.

Have you tried palpating your female? If so, how big are the follicles? If not, links:

http://heathersherpsblog.blogspot.co...palpating.html

http://www.youtube.com/user/jkobylka#p/u/11/TlX9y6wyrsw