Breeds throughout the year in Florida and Texas, with a decline in summer. Breeds March-October in the north. Litter size is 1-7 (average 3-5). Gestation lasts 23 days (nonlactating) or 30 days (lactating). Weaning usually occurs by the third or fourth week. Individuals produce up to several litters/year. Sexually mature in 1-2 months. Lives usually less than one year, infrequently up to about 2 years.