A scientific take on female friendship

Girl talk apparently is good for the one's health, according to a new study. When women feel emotionally close to a girlfriend,  levels of the hormone progesterone  increase, helping to boost mood and alleviate stress.

The study, by researchers at the University of Michigan, examined progesterone levels in the saliva of 160 college students. The researchers measured progesterone levels and levels of the stress hormone cortisol and obtained information about menstrual cycles and any use of hormonal medications. The women were randomly assigned to partners and asked to perform a task designed to elicit feelings of emotional closeness or a task that was emotionally neutral. After the 20-minute talks the women played a computerized, cooperative game  with their partners, then had their progesterone and cortisol sampled again.

The progesterone levels in the women who participated in the emotionally close task remained the same or increased while those in the emotionally neutral group tended to decline. In the study, progesterone was used as a marker for oxytocin, a hormone linked to relationship trust and bonding. Oxytocin, however, can only be measured through spinal fluid or brain scans.

A week later the participants played a computerized card game with their partners again, had their saliva tested and were also asked how willing they would be to risk their lives for their partners. The study found that increased progesterone levels predicted a willingness to say they would risk their lives for their partners.

The study supports a concept in evolution that is gaining momentum -- that the hormonal basis of social bonds enables people to suppress self-interests when necessary to promote the well-being of another person. The research also helps explain why social contact appears to lead to improved health.

"Most of the hormones involved in bonding and helping behavior lead to reductions in stress and anxiety in both humans and other animals," the lead author of the paper, Stephanie Brown, said in a news release. "Now we see that higher levels of progesterone may be part of the underlying physiological basis for these effects."

The study is published in the June issue of the journal Hormones and Behavior.

--Shari Roan

Comments

[Linda]

ahh, this was us just a couple of weeks ago
LYMY

[Carl]

I enjoyed reading your study on hormones and self, the study stated, “The hormonal basis of social bonds enables people to suppress self-interests”. In addition, published in the June issue of the journal Hormones and Behavior. There is a parallel study done on “self’, this study involved 200 college students. I think you might enjoy reading it. This study was just released in a publication called The Power of Self Separation Acceptance or Rejection. This study explores a new understanding of personal behavior.

[Beth]

Is there a similar studyfor men? Why were only female-female parings chosen? This study seems to be concieved under an existing assumption that females are more emotional and empathetic. By narrowly examining female friendship under the "women as nurturers" scope, the scientists are only proving their own bias, nothing more. Clearly, friendship has benefitial effects, but why is it framed in this essentialist rhetoric?

[Shilpa C Nangali]

Very interesting study and i completely agree with this finding!!! - Shilpa Nangali