The female will give birth 21 days after copulating with the male. They will copulate very soon after being put together.
Mice are bred for several different purposes. Some mice are bred as lab mice for medical purposes. Other mice are bred to sell as pets in stores across America. Some mice are even bred by people in their homes to feed pet snakes. There are several factors that contribute to the successful breeding of white mice, including the ratio of female mice to male mice, the temperature of the cage and allowing enough time for the mice to mate.
Most domestic animals don't have a breeding season. Look up the gestation period of a white mouse and put the male in the pen with the female when ever you want babies.
Any season and time.
