Hormones determine who is more likely to cheat

researchers reported on Tuesday.

Estrogen, the so-called female hormone, affects fertility and has been shown to make women dress more provocatively and show more thrill-seeking behavior,plus size evening dresses.

Dr. Kristina Durante of The University of Texas at Austin and colleagues found that young women felt more attractive when they had high levels of an estrogen known as estradiol, and they acted on those feelings.

"Women with higher estradiol reported a greater likelihood of flirting, kissing and having a serious affair with someone other than their primary partner and were marginally more likely to date another man," Durante's team wrote in the Royal Society Journal Biology Letters.

"Results provide support for the relationship between physical beauty and fertility and suggest that women high in reproductive health engage in opportunistic serial monogamy -- being open to affairs and moving on to a new relationship if a higher-quality mate becomes available."

Durante's team tested 52 female undergraduates aged 17 to 30 who were not taking hormone contraceptives. They took two estradiol samples from each, as hormone levels fluctuate from week to week,http://www.1stwebdesigner.com/design/wordpress-alternatives-bloggers/.

They had the women rate their own attractiveness and showed their photographs to others to rate, as well.

"High-estradiol women were considered significantly more physically attractive by themselves and others," Durante and colleagues wrote.

The high-estrogen women also reported more sexual behavior -- especially outside of a relationship, although it was not linked to one-night stands.

"Our results are consistent with the possibility that highly fertile women are not easily satisfied by their long-term partners and are especially motivated to become acquainted with other, presumably more desirable, men," they concluded.

The findings fit in with many other studies showing that hormones influence the behavior and success of both men and women. and British researchers showed that male financial traders whose finger lengths indicate high testosterone levels in the womb made more money.

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Men in committed relationships tend to have lower testosterone levels than those who are single,pandora outlet store, according to a study in the October issue of the Journal of Personality and Social Psychology (Vol,oakley sunglasses cheap,http://grown.nl/content/kweektent-de-voordelen#comment-91754. 91, No. 4). "They are still interested in other women, and they are still high in testosterone. They are still engaged in the mating effort."

Past research suggests that elevated testosterone aids men in their efforts to attract mates by increasing their confidence and aggressiveness toward competing men,black evening dresses, he adds.

Gangestad and his colleagues collected the saliva of 176 undergraduate students and then asked them to complete a questionnaire assessing their current relationship status and attitudes toward cheating. Some of the students were asked whether they'd consider cheating and others were asked whether they'd cheated in the past.

The single men, including people who would consider cheating and those who said they never would, had equally high levels of testosterone. The men in relationships who would not consider cheating, however, showed low testosterone compared with the relationship-bound men who would.

The results suggest that testosterone levels change in response to social conditions, and that the hormone helps men meet the perceived challenges of their environment, Gangestad says. While elevated testosterone levels help men find mates, lower levels may promote affiliative and nurturing behavior,cheap evening dresses, he notes. In fact, lower levels of the androgen are associated with increased responsiveness to infant cries, past research shows.