First I've never had a male lock with a female after OVY!. Doens't mean they wont just means I haven't seen it. Now keep pairing them till she ovulates, at some point the male will get tired so keep an eye on him they aren't machines and will ware out. If you miss the ovulation and POS (post ovulation shed) then one day you'll find eggs. But you be able to tell leading up to the Ovulation. She'll bowl wrap, glow, lay on her back, quit eating, quit breeding then just check her every day.. simple as that..
You know Ed, I have only had one girl bowl wrap this season and I've had 3 ovys this month. It must be because I cooled them or something. I recently turned my heat up and since then I have had the one bowl wrapping.