Scientists from the University of Zurich asked a group of
males to rank the body odours of 28 women of a reproductive age.
The women had previously been tested for their levels of key
fertility hormones.
All the men agreed the most pleasant odours were given off
by women with the highest levels of oestrogen.
Oestrogen regulates the menstrual cycle and causes eggs to
mature in a girl's ovaries when she reaches puberty.
Since this hormone is a 'signifier of fertility', the
findings suggest 'body odours are linked with reproductive health, which men
can sense via smell', the researchers said.
Infertility affects around one in six women in the UK,
statistics show.
And in the US, one in 10 struggle to get or stay pregnant,
according to the Center for Disease Control and Prevention.
Infertility in women is usually caused by problems with
ovulation, such as an egg not being released, the NHS states.
In men, poor-quality semen, the fluid that contains sperm,
is often to blame.
However, for around a quarter of couples who are struggling
to conceive, there is no clear cause.
Past studies have shown the smells produced by a woman's
hormones can make her more attractive to the opposite sex.
However, whether this is an indicator of her fertility was
unclear.
To find out more, the researchers asked men to rate the body
odours of 28 healthy women.
The women had previously been tested for their levels of the
hormones estradiol, progesterone, testosterone and cortisol.
Estradiol is one of four 'dominant' oestrogen hormones that
occur naturally in women.
Progesterone maintains the lining of the uterus in
preparation for the attachment of a fertilised egg.
If ovulation does not occur, progesterone levels fall and a
woman sheds the lining during her period.
Although testosterone is higher in men, it also gives women
their sex drive.
Finally, cortisol, 'the stress hormone', was looked at.
Feeling frazzled is known to affect a woman's chances of conceiving.
Results revealed all the men found the odours of women with
high levels of estradiol in their saliva the most attractive.
Perhaps surprisingly, the males were also drawn to the
females who produced low amounts of progesterone, despite its links to
fertility.
The full results were presented at the 50 Years of
Psychoneuroendocrinology conference in Milan.
'Since estradiol and progesterone levels are signifiers of
reproductive health and fertility, researchers suggest body odors are linked
with women's reproductive health, which men can sense via smell,' the authors
wrote.
(Daily Mail)
Comments
Post a Comment