article_snippet: Researchers also found that the increase in oxytocin was greater for those men who were absent longer .
article_snippet: Researchers also found that the increase in oxytocin was greater for those men who were absent longer, and linked with changes in testosterone (pictured) '
article_snippet: Previous studies have shown that oxytocin makes people more cooperative while testosterone has the opposite effect.
article_snippet: And German researchers recently said that oxytocin may also play a key role in monogamy, a trait that is rare among mammals, other than German researchers.
article_snippet: In either case, the increased oxytocin could serve as a balance to make the hunters kinder, more generous and more willing to share the hunters bounty. '
article_snippet: The oxytocin was measured in the UCSB Human Biodemography Laboratory.
article_snippet: Though the sample size is 'not huge,' Trumble and Jaeggi noted, the studydefinitely adds to the current literature in which the interplay between testosterone and oxytocin is often overlooked.' '
article_snippet: Reconnecting with their families after a day of separation would have been a very common challenge for men throughout evolutionary history, and oxytocin could help with that.'
article_snippet: As well as helping partners reconnect after a day apart, oxytocin may have use in post-hunt recovery.
highlights_snippet: The larger the spike, the more oxytocin a man produced on arrival home .
  
highlights_snippet: Increase in oxytocin was greater for those men who were absent longer .