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Animal Bioresource in Japan

.: Home > Animal Bioresource in Japan > 2010 > Volume 59 Number 2 > Takashi YOSHIDA1), Koji HANARI2), Koji FUJIMOTO2) and Tadashi SANKAI1)

Female Reproduction Characteristics in a Large-Scale Breeding Colony of Cynomolgus Monkeys (Macaca fascicularis)

Takashi YOSHIDA1), Koji HANARI2), Koji FUJIMOTO2) and Tadashi SANKAI1)
1) Tsukuba Primate Research Center, National Institute of Biomedical Innovation 2) The Corporation for Production and Research of Laboratory Primates
Abstract :

We studied two mating systems for a large-scale breeding colony of cynomolgus monkeys: (i) a 3-day timed system that keeps one female and one male together in a cage for 3 days beginning 11 days after menstruation, and (ii) a 7-day timed system beginning 9 days after menstruation. Regardless of the mating system used, we propose a practical definition of an infertile female as one that does not become pregnant in up to six pairings. If we eliminate these animals from the breeding colony, the pregnancy rates would be 3.6 times higher. Eliminating infertile females from a breeding colony is important in order to save labor, time and cost and to maintain a healthy breeding colony

Keywords :
cynomolgus monkey, menstrual cycle, reproduction

Date Deposited : 21 Jun 2011 14:06

Last Modified : 21 Jun 2011 14:15

Official URL:

Volume 59, Number 2, - 2010

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