Ovulation time: A factor in ape fertility assessment
Version of Record online: 2 JUN 2005
Copyright © 1982 Wiley-Liss, Inc., A Wiley Company
American Journal of Primatology
Supplement: Workshop on Infertility in Male Great Apes November 23–25, 1980, Atlanta, Georgia and Symposium on Primate Reproductive Strategies December 6, 1980, Washington, DC
Volume 3, Issue Supplement S1, pages 51–55, 1982
How to Cite
Graham, C. E. (1982), Ovulation time: A factor in ape fertility assessment. Am. J. Primatol., 3: 51–55. doi: 10.1002/ajp.1350030511
- Issue online: 2 JUN 2005
- Version of Record online: 2 JUN 2005
- Manuscript Accepted: 17 APR 1981
- Manuscript Received: 16 MAR 1981
- steroid hormone;
In chimpanzees, ovulation time can be estimated in relation to the time of sexual swelling regression, itself a periovulatory parameter. Correlations of steroid hormone and gonadotropin levels, endometrial morphology, basal temperature, and ovarian morphology consistently suggest a close temporal correlation between ovulation and the last days of maximal sexual swelling.
In the gorilla, LH elevations occur during the one to four days of labial swelling, suggesting that ovulation is restricted to this easily detectable phase of the menstrual cycle.
The menstrual cycle of the orang-utan lacks an externally visible periovulatory indicator, such as the sexual swelling, for correlation with ovulation time. Possibly a sharply defined period of female sexual proceptivity could provide a usable periovulatory criterion applicable to captive orang-utans.