It wont hurt anything but why exhaust your male if you female doesnt have large follicles and isnt close to ovulating? Yes, sperm can be retained sometimes for more than a year. If your introducing multiple males anyone of them can be the sire. Think of it this way, if your just starting introductions you only need a lock every month or so but when they start building and their follicles are getting closer to the point of ovulation you may want to introduce the male every week. You can do it however you like but why waste your time and exhaust your male when the female is nowhere near ovulating? Just a thought. Good Luck![]()