Parents to Blame for Girls' Short-Term Relationships
Researchers from the University of Western Australia studied the DNA of almost 150 university students.
In the study participants were asked to provide a DNA sample and to fill in a detailed survey about their love lives.
The scientist examined the DNA for variations in genes known to affect the immune system, where the more diverse these genes, the stronger a person's defence against disease.
The researchers then compared the results of the test to the questionnaires.
This showed that the women with the most varied major histocompatibility (MHC) genes, had the most sexual partners, the Daily Mail reported.
The scientists, reporting in the journal Animal Behavior, said they weren't sure why a woman's immune system affected her relation to men.
It was also unclear whether her genes make her attractive to the opposite sex – or whether she finds them attractive.
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