Neue Studie: Männer mit kleineren Eiern sind bessere Väter

Anthropologists from Emory University in Atlanta wanted to try to better understand why some men are more actively engaged in child rearing than others, said study lead author James Rilling. (...) So the study authors decided to investigate whether anatomy or brain function explained the variation in parenting styles.

(...) The findings, Rilling said, suggest that "men with smaller testes and lower testosterone levels were more involved in care-giving. The men with smaller testes volume also had a stronger neural response -- the fMRI showed more activity in the ventral tegmental area, a reward center of the brain -- when the men viewed images of their children."

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