how long do females build for before they ovulate ????

how long do females build for before they ovulate ??
my girl had her first lock in december , the last lock was feb , i was feeding her every 5 days but she has not taken food for 10 days today ,
just wanted to now how long roughly do they build for ?
thanks

I think it depends on the female. I started pairing up my girl in November. She ovulated this past Sunday. She really started building and going through her breeding behaviors (bowl wrapping, lumping) during late December and January.