Seducing Women Blog

A study published in Psychological Science has found a link between a set of genes involved with immune function and partner selection in humans. People are inclined to prefer mates who have dissimilar MHC (Major Histocompatibility Complex) genotypes, rather than similar ones. This preference may help avoid inbreeding between partners as also strengthen the immune systems of their children through exposure to a wider variety of pathogens.

“As the proportion of the couple’s shared genotypes increased, womens’ sexual responsivity to their partners decreased, their number of extra-pair sexual partners increased and their attraction to men other than their primary partners increased, especially during the fertile phase of their cycles,” the study’s author Christine Garver-Apgar explains.

The researchers say their study offers some understanding of the basis for romantic chemistry, and is the first to show that compatible genes can influence romantic relationships.