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Love hormone 'predicts how long your love will last'

Washington , Sat, 25 Feb 2012 ANI

Washington, Feb 25 (ANI): Just how long a relationship will last can be predicted by the amount of "love hormone" in the bloodstream of a newly smitten person, a new study has claimed.


For the study, researchers measured levels of oxytocin in people who had recently begun relationships. Six months later, the couples with the higher levels of oxytocin tended to still be together, while the others had split.


The finding suggests that oxytocin, a hormone also involved in mother-infant bonding, plays an important role in the initial stages of romantic attachments.


In addition, the work shows that, at a biological level, the process of becoming attached to a new partner may be similar to the process of bonding with a new child.


A previous study found a nasal spray of oxytocin could improve interactions between couples. It is possible that oxytocin-based treatments "may improve specific relational components among couples in distress," the researchers said.


The researchers, from Bar-Ilan University in Israel, interviewed 60 couples in their 20s who had begun a relationship within the previous three months.


Members of a couple were first interviewed separately about their thoughts, worries and hopes for the new relationship, and then together to discuss a positive experience they had shared. Blood samples were taken from these participants, as well as from 43 volunteers who were single.


The people in new relationships had oxytocin levels that averaged nearly double those of singles. For couples who stayed together, oxytocin levels remained stable over a six-month period.


"These findings suggest that OT in the first months of romantic love may serve as an index of relationship duration," Fox news quoted the researchers as saying.


In both singles and couples, levels of oxytocin did not depend on an individual's gender, body weight, height, smoking status, use of contraceptive pills or sexual activity.


According to the researchers, couples with higher levels of oxytocin exhibited more affection during interviews, such as touching and eye-gazing. Such intimate behaviours may increase oxytocin levels and, in turn, increase a couple's emotional involvement in the relationship.


The researchers noted that because the people in relationships were not tested before they paired up, it wasn't clear which was the cause and which was the effect - whether the new relationship increased their oxytocin, or people with naturally high oxytocin levels are more likely to couple up.


In addition, it wasn't clear whether oxytocin levels in the blood reflect those in the brain, but studies suggest the two are coordinated.


The study has been published online in the journal Psychoneuroendocrinology. (ANI)



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