For example, one study found a preference for dissimilarity in male raters of female odour but not for female raters, while another observed preference for similarity only of genes inherited from the father.
Other research has found preferences for odour shift across relationship status, contraceptive use, and ovulatory cycle, while one study has shown indifference towards similarity altogether.
Thankfully, our natural mate choice mechanisms, evolved over millennia, have already equipped us with sophisticated preference systems to get us the best we can – that’s what “sexual chemistry” is.
Should you trust Singld Out to accurately match you based on the genetics of body odour alone? Not unless you happen to be a non-ovulating, non-contraceptive using woman who needs help avoiding accidental sex with close genetic relatives.
Multiple studies have actually observed such MHC-dissimilar odour preferences across numerous animal species.
Frustratingly though, human relationships tend to be a lot more complicated than your average rat pairing (no offense to rodent readers).
Increase your circle of friends, locate the best areas to ride, or find that special someone.
Evolution may have selected for this attraction to dissimilar immune systems in mates, producing offspring with greater MHC diversity.Most of these results have either found no effect of MHC genes or found that populations are actually more similar in MHC genes than expected by chance.Only one study has shown convincing evidence of MHC-dissimilar preferences.One method of assessing immune function is through sense of smell, as MHC-byproducts occur in bodily fluids such as sweat and saliva.Singld Out proposes that by typing these genes, they are able to find perfect matches based on genetic MHC dissimilarity.