They are polyamorous

One of the most interesting facts about wolverines is they have several partners. This implies that one male will mate with multiple females he let live in his territory in the spring and summer when they achieve sexual maturity, around age two. Females build dens where they will give birth to their young after mating. Gestation lasts between four and seven weeks after the fertilized eggs are implanted in the fall or winter. Every year, during the same period, generally in the late winter or early spring, females give birth to two or three young. Most babies are born in February and March.

Baby wolverines are called kits. Kits are born with their eyes closed, under five inches long, weighing only a few ounces, and coated in white fur. The kits have darker fur by the time they are six weeks old, and their faces, necks, and chests each have distinctive color patterns. Males occasionally stop by and take care of the young while the females do most of the parenting.

Until they are ready to have their kits, kits will occasionally remain with their mother. Wolverines reach sexual maturity at roughly 2 years of age. The Wolverine Foundation claims that by September, kits typically leave on their own. An average wolverine lives seven to twelve years.