Females bear young every two years following a 160 to 180 day gestation. The young cling to their mother's chest until they are larger, when they move to her back a Capuchin Monkey takes 18 - 24 months to grow into an adult. Adult male capuchins rarely take part in caring for the young. Within four years for females and eight years for males, juveniles become fully mature. In captivity, individual capuchins have reached an age of 45 years, although life expectancy in nature is only 15 to 25 years.