Woodchucks stay within 100 yards of their burrow to quickly escape from predators. They find an entrance to a burrow and if the female s scent is fresh he will enter the burrow. The female may chase the male out until she is ready to mate. The couple will live in the female s den the entire mating season. Monogamy is normally the rule, but in a few instances there has been some polygamous tendencies by the males.
Copulation takes place inside the den.
When pregnant females are almost ready to give birth they kick the male out of the den. If the male returns, the female may be forced to dig a new den. The female gathers dried grasses and fine weeds for the nursery nest. Gestation lasts for 28 days. The female gives birth to 2-4 naked and blind babies.