Sexual swellings are enlarged areas of the perineal skin occurring in some female primates that vary in size over the course of the menstrual cycle. In ovariectomized chimpanzees, estrogen stimulation can induce such tumescence and progesterone can inhibit it. Studies of chimpanzees and Barbary macaques suggest that sexual swellings serve as honest advertising of female fertility and thereby encourage males to copulate when the probability of conception is highest.
- Deschner, T.; Heistermann, M.; Hodges, K.; Boesch, C. (2004). "Female sexual swelling size, timing of ovulation, and male behavior in wild West African chimpanzees". Hormones and Behavior 46 (2): 204–215. doi:10.1016/j.yhbeh.2004.03.013. PMID 15256310.
- Graham, C. E.; Collins, D. C.; Robinson, H.; Preedy, J. R. K. (1972). "Urinary Levels of Estrogens and Pregnanediol and Plasma Levels of Progesterone during the Menstrual Cycle of the Chimpanzee: Relationship to the Sexual Swelling". Endocrinology 91 (1): 13–24. doi:10.1210/endo-91-1-13. PMID 4112628.
- Brauch, K.; Pfefferle, D.; Hodges, K.; Möhle, U.; Fischer, J.; Heistermann, M. (2007). "Female sexual behavior and sexual swelling size as potential cues for males to discern the female fertile phase in free-ranging Barbary macaques (Macaca sylvanus) of Gibraltar". Hormones and Behavior 52 (3): 375–383. doi:10.1016/j.yhbeh.2007.06.001. PMID 17644098.
|This primate-related article is a stub. You can help Wikipedia by expanding it.|