although a variety of reproductive methods are used, the most common is for a single adult female in the group to be reproductively active and to mate with multiple adult males in the group. after a gestation period of about 145 days, she gives birth to either a single infant or twins. males contribute significantly to care of the infants. sexual maturity is reached at about 2 years, and it can live up to 13 years. geoffroy's tamarin is classified as being of "least concern" by the iucn.