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【bio-news】生理周期改变妇女外观与态度
Cycle Changes Women's Looks, Attitudes
New Study Finds That When Women Ovulate, They Put in More Effort to Look Good and Act Differently
(PhotoDisc)
Oct. 10, 2006 — It's an age-old question: What makes a woman dress to impress?
A new report says the answer might be in the ovaries.
According to a study done by UCLA and the University of Wisconsin-Eau Claire, women put more time and effort into their appearance when they're ovulating.
Clothes and makeup aren't the only things that change at that time of the month: Women's strength, appetite and attitudes toward men and each other change as well.
The study's lead author, UCLA professor Martie Haselton, explained how she and her researchers had come to the conclusion that ovulation affects a woman's appearance.
"What we did was photograph the women on a high fertility day and a low fertility day, and we showed those photographs to a separate set of judges, and we asked them, 'In which photo is the woman trying to be more attractive?'" she said.
The judges picked a woman's high fertility photograph 60 percent of the time — a rate much higher than random chance.
"For the women who were actually ovulating on the day of their period, it was more than 80 percent for those photos," Haselton said.
People have long thought that women hid all signs of ovulation, even from themselves and their mates. Haselton's study shows that many signs do exist, though they're subtle.
From Appetite to Attitudes
"Women experience a decrease in appetite near ovulation, even though there's an increased caloric need. And that's not just compared to when they are PMSing," Haselton said.
There's also evidence that women are stronger when they're most fertile.
"There's one study that showed that women's hand strength increased during ovulation," Haselton said.
Women may even be more tempted to cheat when they're ovulating than at other times of the month. Their preferences for types of men can also change.
They look more for facial masculinity and male scents — the body scents that may be associated with greater testosterone," Haselton said. "They tend to go for the softer side, kind and caring, having sweet faces."
Women's interactions with each other can change too.
"There is preliminary evidence that women rate other women as less attractive during ovulation. One possibility is that they feel better about themselves. Maybe they feel better so they dress better," Haselton said. 今日相关报道，参考下：
Study links women's fashion sense to ovulation
Ian Sample, science correspondent
Wednesday October 11, 2006
The Guardian
Women are more likely to dress to impress when they are at their most fertile, according to psychologists. A study of female university students found they eschewed drab clothing for a more flamboyant style when they were ovulating, suggesting hormonal changes had an unconscious effect on their behaviour.
Photographs of the women revealed they more frequently wore jewellery as well as trendy and more revealing clothes at the most fertile phase of their monthly cycle. "They tend to put on skirts instead of pants, show more skin and generally dress more fashionably," said Martie Haselton, the University of California Los Angeles researcher who led the study.
Dr Haselton said some women appeared to make subtle tweaks to their usual dress when they were most fertile, such as donning more striking tops and adding necklaces and earrings. The women were not necessarily dressing more provocatively.
"We did see a little bit more skin. It was my impression that women were just dressing a little bit more fashionably, but not sexier," she said.
The psychologists recruited 30 female university students and staff aged 18 to 37 and invited them to attend the lab as part of the study, but did not explain to them what the experiment was investigating. The women visited the lab several times a month and gave urine samples which were tested for female hormones to calculate the 15th day of their menstrual cycle, the day of ovulation.
The women were photographed twice, once within a few days of their most fertile phase and again in their least fertile phase. Dr Haselton's group then blacked out the faces in the photographs and asked a mixed panel of 17 men and 25 women to say in which photo each woman was trying to look more attractive.
The judges picked the photos of women at their most fertile an average of 60% of the time, according to the journal Hormones and Behaviour. Those women photographed on the exact day of ovulation were picked 83% of the time.
"This is well beyond chance. They were pretty consistent," Dr Haselton said.
Writing in the journal, the psychologists claim their findings disprove the conventional wisdom that women are unique among animals in concealing, even from themselves, when they are most fertile.
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作者:admin@医学,生命科学 2011-09-09 05:15
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