A large number of studies, involving different experimental methods and populations, have now been reported, and they give discordant results.While some research has supported the theory that MHC gene diversity drives human attraction, other studies have reported different or conflicting results.
Best dating site for sexual role play
As one scientific review of the entire body of data concluded, “the mixed evidence …
makes it difficult to draw definitive conclusions, [but] the large number of studies showing some MHC involvement suggests there is a real phenomenon that needs further work to elucidate.” Into this complicated field now come direct-to-consumer genetic testing companies such as Instant Chemistry and Singld Out.
This might argue for a heightened awareness of the importance of keeping a relationship on a positive keel.
Genetic affinity testing may also have some marginal benefit for new matches, where singles make choices with limited knowledge about potential partners.
A few studies have found that humans prefer sexual partners with only moderately different or even similar MHC variants, others have found that MHC diversity is detected by facial shape rather than smell, and still more have found that women in committed relationships are most attracted to men with different MHC alleles.