Locking and building are, for the most part, independent from each other. There is some evidence that breeding can help to start a female toward producing follicles, but females also build follicles without ever locking with a male.

So there is no set time between a female locking and starting to build follicles. Actually, there is no guarantee that a female that locks will even produce follicles, let alone eggs. Keep doing what your doing, watch for an ovulation, and keep track of when they shed. Keep notes and you'll be surprised how quickly you'll have everything down.