Hmm, ok now this is a tricky subject because this was my first time mating my only female bp Oct 5,2015 and i kept watching videos n how to palpate her but to no avail they might have been there but i didn't know what i was feeling for meaning how firm or soft the follicles might/would be, so i just let her build tell me.. The way i let the build tell me was when she went off food for 4 weeks but maintained a good girth like she had eaten but really she didn't, then i intro'd the males and her brother locked with her she went off feed for 1.5 months offered her a nice sized rat and she took it.. I'm sorry if it sounds like i'm rambling but i'd just let her building of follicles tell you, when she's ready to mate, again sorry if this didn't answer your question..