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Research has found that estradiol positively and progesterone negatively predicts women’s sexual desire. […]

The current study extended these findings by examining, within a sample of 33 naturally cycling women involved in romantic relationships, hormonal correlates of sexual attraction to or interests in specific targets: women’s own primary partner [in-pair] or men other than women’s primary partner [extra-pair]. […]

Whereas estradiol levels were associated with relatively greater extra-pair sexual interests than in-pair sexual interests, progesterone levels were associated with relatively greater in-pair sexual interests.

{ Hormones and Behavior | Continue reading }

photo { Maxime Ballesteros }