Yep! Just keep it up until she ovulates or shortly before if you are pretty sure she is going to keep refusing to lock. Generally the female will stop allowing him to lock before actual ovulation, but since you are brand new to breeding, it may be better to just keep trying. Once the follicles are about 25mm is about that point where pairing no longer does any good, she will likely refuse to lock, and she is just at the final stages of building before ovulation.
Congrats! That's really exciting they locked for you, and hopefully they will this next time too.
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