The chest-rubbing behavior of 8 male greater galagos was studied. Castration of 4 males resulted in a sharp decrease in chest-marking, while testosterone replacement therapy resulted in an increased frequency. The 4 male controls generally maintained a stable relationship between chest-rubbing frequency and serum testosterone levels. Results of the study indicate that while chest-rubbing frequency may initially vary individually in relation to testosterone levels, drastic fluctuations in serum testosterone are accompanied by a corresponding fluctuation in chest-rubbing behavior.
Hi Ali: Regarding the mint studies…I just saw this on Suppversity…regarding the difference between mints effects on male and female rats…..Spearmint (M. spicata): At least in women spearmint tea has been shown to increase estrogen and luteinizing hormone in the follicular phase of their menstrual cycle (Aktodgan. 2007). In a 2004 study that was conducted on male rodents, on the other hand, the daily administration of peppermint tea (M. spicata) for a period of 30days lead to significant increases in luteinizing and follicle stimulating hormone and increases in serum testosterone, yet with the serious downside of “extensive degenerative changes in the germinal epithelium and spermatogenesis arrest compared with the findings in the testicular biopsies of the control group” (Aktogan. 2003) interesting for sure!
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