Reproductive, gestational, and newborn physiology of the chimpanzee

The Yerkes Regional Primate Research Center has successfully bred chimpanzees since 1930. Breeding statistics for the last 6 yr and problems of fetal waste and infant mortality are presented here. Experience with a potential advantages of semi-free-ranging breeding systems are presented. This 6-yr study period also produced considerable information on gestational and newborn physiology.