Must have good genes (Image: Image Source/Rex Features)
GENES behind the immune system may explain why some women have more sexual partners than others.
The major histocompatibility complex (MHC) is a region of DNA vital to the immune system. The more diverse the genes of the MHC, the more effective it is at conferring disease resistance, and in a variety of animals individuals with diverse MHCs are more likely to be chosen as a sexual partner. Its effect in humans, however, is unclear.
Hanne Lie of the University of Western Australia in Perth measured the diversity of the MHC in…
