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女性健康:關(guān)于女人身體密碼的五個(gè)錯(cuò)誤觀念

放大字體  縮小字體 發(fā)布日期:2009-06-30
核心提示:Historically research has focused on men. As one example, women are under-represented in major clinical trials for cancers that affect both sexes, a new study found. Researchers say several factors could be responsible, from childcare issues to relu

    Historically research has focused on men. As one example, women are under-represented in major clinical trials for cancers that affect both sexes, a new study found. Researchers say several factors could be responsible, from childcare issues to reluctance by researchers to expose women of childbearing age to trial drugs and treatments.

    In other areas where research into women's medical problems is lacking, the issue is not just about sexism. Women's hormone fluctuations are, well, complicated and can confound basic findings. But in recent years, women have been getting increased attention.

    Still, much misinformation about the female body circulates in mainstream consciousness.

    Myth: A women can't get pregnant during her period.

    While a woman is unlikely to conceive during menstruation, "nothing, when it comes to pregnancy, is impossible," said Aaron Carroll of Indiana University and co-author of "Don't Swallow Your Gum: Myths, Half-truths and Outright Lies About Your Body and Health" (St. Martin's Griffin, 2009). Once inside a woman, sperm can wait for an egg for up to a week. Ovulation can occur soon after, or even during, the bleeding phase of a woman's menstrual cycle, giving patient sperm the chance to get lucky. The timing method of birth control doesn't work well, Carroll said, agreeing that couples who practice it are often called: parents.

    Myth: Menopause causes sex drive to nosedive.

    The Change is not necessarily one that happens in the bedroom. A comprehensive survey of sexual habits in the United States, completed by Edward Laumann and colleagues in 1994, found that roughly half of women in their fifties have sex several times a month. While hot flashes and other discomforts may make a women temporarily not in the mood, there is not a direct link between menopause and sexual desire, Vreeman said. So if you are entering the Big M, there is no reason to say good-bye to the Big O.

    Myth: Antibiotics make birth control pills unreliable.

    "Many physicians even believe this," Carroll said. Alone, birth control pills fail about one percent of the time. And that failure rate is unchanged when taken with the vast majority of antibiotics, Carroll said. A possible exception is rifampin, the antibiotic prescribed for tuberculosis. Rifampin does lower pregnancy-protecting hormone levels induced by birth control pills, but whether the effect is large enough to increase pregnancy risk is unclear. Carroll thinks rifampin research spurred the antibiotic/birth control rumor. "Sometimes people say things and they just take off," he said.

    Myth: Women and men need equal sleep.

    Tossing and turning not only causes women more psychological distress, it also raises their insulin and inflammation levels -- risk factors for compromised health, found a 2008 study of 210 people led by Edward Suarez at Duke University. A study of more than 6,000 participants, led by researchers at the University of Warwick in 2007, found that women who slept five or less hours a night were twice as likely to suffer from hypertension than women who slept for seven or more hours. Among men, there was no such relationship. Sleeping Beauty may be better off waking up on her own watch.

    Myth: A doctor can tell if a woman is a virgin.

    Even when using 10-fold magnification, doctors can not accurately sort virgins from the sexually-active, several studies have reported. It is not as simple as looking for a hole in the hymen because, well, there is always a hole in the hymen. "Some people think the hymen seals off the vagina [until virginity is lost], but that is just not true," said Dr. Rachel Vreeman of Indiana University and Carroll's co-author of "Don't Swallow Your Gum." In the rare cases when it is sealed, period blood builds in the uterus and causes severe medical problems, she said.

    一直以來(lái),大多數(shù)研究都把目光放在男性身上。比方說(shuō),在那些男人和女人都會(huì)得的癌癥研究中,對(duì)于女性被試者比男性少很多。研究人員認(rèn)為這是由多種因素造成的,比如由于婦女需要養(yǎng)育子女,因此很多研究者對(duì)讓育齡婦女參加臨床試驗(yàn)而有所顧慮。

    另一些嚴(yán)重對(duì)女性健康問(wèn)題研究的匱乏,就不單單是因?yàn)樾詣e歧視了。女性的荷爾蒙作用,比男性更復(fù)雜,而且會(huì)和基本研究問(wèn)題產(chǎn)生相互作用。不過(guò)近些年,女性正在獲得越來(lái)越多的關(guān)注。

    不過(guò)在我們的視野中,還有很多關(guān)于女性健康的錯(cuò)誤觀點(diǎn)在不斷流傳。

    誤區(qū):女性在來(lái)月經(jīng)時(shí)不會(huì)懷孕

    雖然女性來(lái)月經(jīng)時(shí)的確不容易受孕,"不過(guò)在懷孕的問(wèn)題上,沒(méi)有什么是不可能的。"印第安納州大學(xué)的Aaron Carroll曾經(jīng)這么說(shuō)過(guò)。她曾與人合寫(xiě)了《別咽口香糖:關(guān)于身體和健康真真假假那些事》

    精子可以在女性體內(nèi)存活長(zhǎng)達(dá)一周。而排卵可以發(fā)生在月經(jīng)周期剛結(jié)束、甚至還在流血的日子里,這讓那些耐心的精子獲得了機(jī)會(huì)。安全期避孕法并不可靠,Carroll說(shuō)。她還給那些用這種方法避孕的夫妻們起了個(gè)名字:父母。

    誤區(qū):更年期讓"性趣指數(shù)"暴跌

    這個(gè)變化不一定會(huì)發(fā)生在臥室里。1994年,Edward Laumann和同事們?cè)诿绹?guó)進(jìn)行的一項(xiàng)關(guān)于性習(xí)慣的詳盡調(diào)查,調(diào)查顯示,在五十多歲的女性中,大約一半每個(gè)月仍然會(huì)做幾次愛(ài)。

    雖然燥熱和其他的不適癥狀會(huì)讓女人們暫時(shí)"不在狀態(tài)",不過(guò)更年期和"性趣"之間沒(méi)有直接聯(lián)系,Vreeman說(shuō)。所以,如果你到了這個(gè)時(shí)候,可不意味這你就要想"飄然欲仙"說(shuō)byebye.

    誤區(qū):抗生素會(huì)讓避孕藥失效

    "甚至很多家庭醫(yī)生都相信有這么回事"Carroll說(shuō)。如果只用避孕藥,失敗率是1%,這個(gè)比例不會(huì)隨著服用絕大部分的抗生素而有所變化。

    一種可能的例外是利福平,一種治療肺結(jié)核的抗生素。利福平的確會(huì)讓由于避孕藥而產(chǎn)生的避免懷孕荷爾蒙水平降低,不過(guò)這個(gè)效果能否增加懷孕的危險(xiǎn)并不清楚。Carroll認(rèn)為正是對(duì)利福平的研究導(dǎo)致了關(guān)于抗生素和避孕藥之間的流言,"有時(shí)候人們會(huì)說(shuō)些自己都不清楚的事情".

    誤區(qū):女人和男人需要等量的睡眠。

    根據(jù)杜克大學(xué)Edward Suarez2008年對(duì)210人進(jìn)行的調(diào)查,輾轉(zhuǎn)反側(cè)不但會(huì)造成女人心理上的壓力,還會(huì)提高胰島素水平和炎癥癥狀,從而危害健康。

    而在另一項(xiàng)2007年Warwick大學(xué)研究人員對(duì)超多6000人進(jìn)行的研究,那些睡眠少于每晚5小時(shí)的女性比睡超過(guò)7小時(shí)的女性,罹患高血壓的幾率高一倍。而在男性中卻沒(méi)有這種關(guān)系。睡美人最好是自然醒。

    誤區(qū):醫(yī)生能分辨處女

    不少研究證明,即使用10倍的放大鏡,醫(yī)生也不能準(zhǔn)確地區(qū)分處女和非處女。這并不是看處女膜有沒(méi)有洞那么簡(jiǎn)單,實(shí)際上,處女膜就是有個(gè)洞。

    "有些人認(rèn)為處女膜封上了陰道(直到失去貞操),不過(guò)并不是那樣。"《別咽口香糖》的另一位作者,印第安納大學(xué)的Rachel Vreeman介紹說(shuō),在極少個(gè)案中,它的確是全封閉的,導(dǎo)致經(jīng)血在子宮中淤積,這會(huì)導(dǎo)致嚴(yán)重的疾病。

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關(guān)鍵詞: 女性 健康 女人 身體 密碼
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