Maternal age, parity, and reproductive outcome in captive chimpanzees (Pan troglodytes)
Article first published online: 14 OCT 2005
© 2005 Wiley-Liss, Inc.
American Journal of Primatology
Volume 67, Issue 2, pages 199–207, October 2005
How to Cite
Roof, K. A., Hopkins, W. D., Izard, M. K., Hook, M. and Schapiro, S. J. (2005), Maternal age, parity, and reproductive outcome in captive chimpanzees (Pan troglodytes). Am. J. Primatol., 67: 199–207. doi: 10.1002/ajp.20177
- Issue published online: 14 OCT 2005
- Article first published online: 14 OCT 2005
- Manuscript Accepted: 16 FEB 2005
- Manuscript Revised: 9 FEB 2005
- Manuscript Received: 13 JUL 2004
- NIH. Grant Numbers: RR-00165, U42-RR-15090, NS-42867, NS-36605, HD-38051
- maternal age
As early as the 1970s, it was suggested that nonhuman primates may serve as models of human reproductive senescence. In the present study, the reproductive outcomes of 1,255 pregnancies in captive chimpanzees (Pan troglodytes) were examined in relation to parity and its covariate, maternal age. The results show that the percentage of positive pregnancy outcomes was negatively correlated with increasing parity. In addition, spontaneous abortions, stillbirths, and caesarian sections (C-sections) were positively correlated with increasing parity. Maternal age, rather than parity, was found to be the most important predictor of negative birth outcome. This study supports research demonstrating reproductive decline and termination in nonhuman primates, and is the first to quantitatively account for this phenomenon in captive female chimpanzees. Am. J. Primatol. 67:199–207, 2005. © 2005 Wiley-Liss, Inc.