American scientists have recently completed one of the most extensive studies to date, the first examining the level of prenatal (typical of pregnancy) hormones in the "pregnant couples."
In a study of hormone levels in the saliva of pregnant women were found increased levels of testosterone, cortisol, estradiol and progesterone. Such changes in women can be attributed to pregnancy. But studies in men caused a surprise!
It turned out that fathers hormones change during pregnancy their "halves". Particularly, in men a significant reduction of testosterone and estradiol in normal cortisol levels or rates of progesterone. The findings are published in the journal American journal of Human Biology.
Although the results in women were expected and it is quite natural for the first time a survey of men shows that fatherhood may lead to changes in the hormonal background. Additional research will help understand whether prenatal hormonal changes partners consequence of a behavior in the postpartum period.
"Other studies have shown that hormones in men changes as soon as they become fathers, but our results show that these changes may begin even earlier, in preparation for fatherhood," - said Dr. Robin Edelstein, lead author of the article . "We do not know exactly why the male hormones are changing. These changes may be due to mental attitude, which appears in men as they prepare to become fathers, changes in their romantic relationships and even physical changes that men experience with their female partners pregnant. "
More scientific article:
Edelstein, RS, Wardecker, BM, Chopik, WJ, Moors, AC, Shipman, EL and Lin, NJ (2014), Prenatal hormones in first-time expectant parents: Longitudinal changes and within-couple correlations. Am. J. Hum. Biol .. DOI: 10.1002 / ajhb.22670
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