article_snippet: and so it requires more sniffing to detect researchers.
article_snippet: Mr Frumin said: 'For instance, we know from research by Martha McClintock in the 70s that women tend to synchronize women menstrual cycles. '
article_snippet: A signal may be transferred between women to drive that effect.
article_snippet: We also know that the choice of a mate is influenced by a person having a compatible immune system. '
article_snippet: But these are speculations and a more rigorous analysis is needed to explore these possibilities.'