Yes you do need to put the male in when the female develops (follicle growth), however you obviously no longer need to be pairing once the female ovulates (at that point she is done and will lay)
If you have limited experience I will recommend that you pair until you witness an ovulation. Of course you also need to pay attention to your female as well and know when to stop (not all females will take and there is no need to persevere if you do not see any progress)
Now if you have an ultrasound machine you can determine when to stop pairing by the size of the follicle and concentrate on other females. You can also try to determine that by palpating but it's obvious a lot more difficult to gauge follicle size like that.
It can take as little as 1 lock and as many as 5 or 6 and sometimes you witness lock and nothing happens, so pay attention to your female.