Scent of a woman

According to the research, published in “Journal Psychological Science”, male testosterone levels are influenced by odour signals emitted by females, particularly when they are ovulating that is when they are the most fertile.

The authors said, “The present research is the first to provide evidence that olfactory cues to female ovulation influence responses in men.”
To understand the response that occurs in humans, psychological scientists Saul L Miller and Jon K Maner conducted two studies.
Women wore tee shirts for three nights during various phases of their menstrual cycles and male volunteers smelled one of the tee shirts that had been worn by a female participant. In addition, some of the male volunteers smelled “control tee shirts” that had not been worn by anyone. Saliva samples for testosterone analysis were collected before and after the men smelled the shirts.

Results showed that men who smelled tee shirts of ovulating women subsequently had higher levels of testosterone than men who smelled tee shirts worn by non-ovulating women or men who smelled the control shirts.

After smelling the shirts, the men also rated the odours on pleasantness and rated the shirts worn by ovulating women as the most pleasant smelling.In other words, this study suggested that testosterone levels may be responsive to smells indicating when a woman is fertile.
The authors conclude that this biological response may promote mating-related behaviour by males.

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