Common Marmosets (IMAGE) University of Zurich Caption Callitrichids, like these common marmosets, usually give birth to two infants. The father and the other group members help the female rear her young. Credit Judith Burkart Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.