There are people who will cool different groups to get production from different animals year round. As far as how they do it I don't know many details.
As far as what we will do is just continue to breed each female until she goes(as long as the female and male both remain in good condition).
Last year was our first year breeding and we stopped breeding everyone who hadn't ovied at the same time.
This year we don't plan on stopping unless the female Ovys, the male starts to lose to much weight(then you could always rotate a different male in), or the female just stops being interested in breeding for an extended period of time.