June 7, 2004
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Genes 'to blame for infidelity'
Professor Tim Spector, of the Twin Research Unit at St Thomas's Hospital, London, says sutdies of twins suggest a genetic component to infidelity.
If one of a pair of women twins has a history of infidelity, the chances her sister will also stray are about 55 per cent, he claims.
And the tendency for the pair to be either faithful or unfaithful is strongest in identical twins, who have the same genes, he says.
In general he claims the proportion of women as a whole who are unfaithful to their partners is around 23 per cent.
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