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The quintessential possible applicant is prenatal estrogen
The original design supposes you to definitely redheaded female enjoys normally high sexual attention and you will sexual passion than low-redheaded feminine due to some molecular system you to influences the term away from yellow locks in females as well as their sexual conclusion. This has been shown that ladies with high 2D:4D thumb proportion, and therefore suggests connection with an advanced regarding prenatal the hormone estrogen (Manning mais aussi al., 1998), declaration high sex push, highest sociosexual focus, and easier attainment away from sexual thrill (Manning and you may Fink, 2008; Varella et al., 2014). Since yellow hair colour appears to occur with greater regularity from inside the feminine compared to dudes (Shekar et al., 2008; Freeze mais aussi al., 2017; Flegr and you will Sykorova, 2019), Freeze et al. (2017) ideal that prenatal the hormone estrogen, that is particular to help you feminine development, contributes to the phrase out of red locks through the prenatal invention and you will would-be responsible for the latest sex difference in this new regularity out-of redheadedness. In contrast, a survey from the Voracek ainsi que al. (2007) learned that prenatal estrogen, just like the indirectly indicated by the 2D:4D finger proportion, wasn’t of the lightweight hair colors. (更多…)