Men with smaller testicles are better parents
Men with smaller testes are better dads to their toddlers, according to a study published in The Proceedings of the National Academy of Sciences. Previous research has looked at the connection between lower levels of testosterone and parenting, but this research focused on testicle volume, which is linked to sperm count and quality, to see if that played a part.
For the study, researchers looked at 70 biological fathers who had children between 1 and 2 years old, and who were living with the child and biological mother. The mother and father both took part in the interview to determine the father’s involvement in parenting. They gathered information on how often the father changes diapers, feeds and bathes the child, whether they stay home to care for the child when sick and if they take their child to doctor visits. The fathers’ testosterone levels were measured and then underwent an MRI, which measured brain activity while viewing photos of their children with happy, sad and neutral facial expressions.
Researchers found that both testosterone levels and size of the testes correlated with the amount of direct paternal caregiving reported by the parents. Men who had smaller testes showed increased nurturing-related brain activity when viewing photos of their kids.
Researcher say that while there is a correlation between testes size and nurturing activity, personal choice can still determine how involved a father will be in their child’s care. In addition, there could be other factors involved, such as the testes of a man could shrink when they become a father.