最近的研究认为，女性的性欲在排卵期前后发生变化。 像其他哺乳动物一样，人类妇女现在被认为也有性热体验，或发情期。早先的研究人员认为，人类妇女已经完全丧失了发情期，或是“隐藏”了发情期 ，从而使男人对于她们真实的排卵时间一无所知。
Recent research argues that female sexuality changes in the days surrounding ovulation. Like other mammals women are now thought to experience sexual heat, or estrus. Earlier sex researchers assumed that women had lost estrus entirely, or had "concealed" it, thereby keeping men in the dark as to when ovulation was actually taking place.
If men had no idea when women were ovulating, (which occurs in mid cycle), then they might be induced to stay around and care for offspring. The idea is that if men had no idea when women were fertile, then attempting to impregnate several women by showing up on those days of the month when each woman is most likely to conceive is a non starter.
"妇女已经进化出隐瞒排卵期，作为一种手段，以确保男子对自己和孩子的投资" 这一 概念一直有良好的说服力，但现在研究人员已经发现了此一概念的一些关键假设的缺欠。
The notion that women evolved concealed ovulation as a means of securing investment by men in themselves and their children has had a good inning but researchers have been chipping away at some of the its key assumptions.
Is ovulation really hidden, or is it just not advertised? Are men completely in the dark about when women are most fertile in their cycle? Or do they find women more appealing when they are in estrus, just as other male mammals are drawn to estrus females?
A lot of recent research looks for behavioral differences across the menstrual cycle relevant to women's sexual behavior and attractiveness to men. Contrary to the view that human estrus is cryptic, whether unadvertised, or "concealed," many cues can be used to distinguish between women who are close to ovulation and the same individuals at other times in the menstrual cycle.
Feminine lust is probably not one of them. There is no reliable difference in female-initiated sexual behavior between estrus and other parts of the menstrual cycle - as detailed in an earlier post. Some studies reported such a difference but many others did not. On the other hand, a great deal of research now indicates that women are more attractive at mid cycle.
Their body scent is more attractive to men. Their bodies also become more symmetrical due to changing shape of the soft tissues. Skin becomes paler, which is significant because women are slightly less pigmented than men in all ethnic groups. Even women's voices change, becoming more high-pitched when they are fertile.
对于一个理应具有隐蔽排卵的物种，好像这还不够。 当他们的女伴在排卵期里，男子也变得更敏感，因为她们更美丽动人，也更爱争风吃醋。 尽管有所有可能的线索，妇女本身对于自己是否处在排卵期也不甚了了。猜对的机会只为百分之六十。
As if this were not enough for a species supposedly having concealed ovulation, it turns out that men are also sensitive to when their female partners are ovulating because they are more attentive, and express greater jealousy at these times.
Despite all of the possible cues to their reproductive state, women themselves are not particularly good at detecting whether they are fertile or not, guessing correctly about 60 percent of the time versus a 50 percent chance of being right.
Whether they are aware of it or not, women who are fertile behave differently. In particular, they are more likely to wear revealing clothing and to behave in flirtatious ways. The researchers believe that clothing preferences around ovulation may reflect a ratcheting up of female-female competition. Another factor is that they are free of the discomfort of menstruation and pre-menstrual symptoms that may take up as much as a third of the cycle.
All of the above changes in women's attractiveness and flirtatiousness across the menstrual cycle may have a relatively simple hormonal explanation. They might be due to increases in estrogen levels, which peak around the time of ovulation. Other research finds that women whose estrogen (estradiol) level is high are both more physically attractive and more likely to think of cheating on their current mate.
Marilyn Monroe is sometimes given as a good example of a high-estrogen woman given both her curvaceousness and physical attractiveness and her proclivity to love them and leave them so far as boyfriends were concerned. She was also competitive with other women and mostly disliked by them. Moreover, she tended to move up the social ladder, dating leading figures right up to the U.S. president. Perhaps ordinary women feel a little bit more like Marilyn Monroe on days of the month when they are fertile.
2010-02-09 20:26 编辑：kuaileyingyu
If you listen in to a group of single women talking, you might realize that they mostly talk about the men in they meet. What's more, you might realize that they can speak volumes
The average woman cannot keep a secret for longer than 47 hours, a new study suggests. Researchers found that women are overcome by a burning desire to share gossip as soon as the