久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

  Home>News Center>Life
         
 

Sex change can cause headache
(Agencies)
Updated: 2004-08-19 10:19

New research involving male-to-female transsexuals lends further credence to the theory that sex hormones are involved in migraine generation, physicians report in the medical journal Neurology.

"We know that migraine is more frequent in women than in men," co-investigator Dr. Tamara Pringsheim told Reuters Health, "so a lot of research goes into what estrogen does to the brain."

A new way to examine this issue, she added, is to look at a population of genetic males who take antiandrogens and estrogen to induce female sex characteristics.

Pringsheim, at the University of Toronto, and Dr. Louis Gooren, at Free University Amsterdam, distributed questionnaires regarding headache symptoms and frequency to 50 transsexuals who had recently undergone sex reassignment surgery, all of whom were taking hormonal therapy.

Thirteen (26 percent) fulfilled criteria for migraine or probable migraine, similar to the number of cases of migraine in genetic females that would be expected. In contrast, the expected number of cases of migraine in genetic males is significantly lower.

Pringsheim and Gooren theorize that the increased prevalence of migraine is related to the effect of hormone therapy on nitric oxide, a known migraine trigger.

"Normally, vascular reactivity is different in men than in women because of estrogen's effect on nitric oxide," Pringsheim explained. "Interestingly, cardiologists who have studied vascular reactivity in male-to-female transsexuals found something similar -- that they have enhanced arterial activity -- so we know the hormones are doing something to the blood vessels."

She acknowledged that other mechanisms may be at play, such as the stress of gender reassignment or adoption of a female gender role. Follow-up studies that include headache histories and neurological examinations to confirm the diagnosis of migraine should shed more light on these issues.



Michelle Yeoh in a new relationship
European winters may vanish by 2080
Cruise to star in 'War of the Worlds'
  Today's Top News     Top Life News
 

China opens up press wholesale market

 

   
 

The 16th typhoon this year to hit East China

 

   
 

US closes in on China on Olympic gold tally

 

   
 

China pushes kindergarten security

 

   
 

European drug maker gives up patent

 

   
 

HK witnesses strong economic growth

 

   
  Sex change can cause headache
   
  Michelle Yeoh in a new relationship
   
  Mental woes of migrants
   
  European winters may vanish by 2080
   
  Showbiz calls for better management
   
  Icy work not too cool
   
 
  Go to Another Section  
 
 
  Story Tools  
   
  Related Stories  
   
Court backs sex change for girl
   
Sex-change woman gets married
  Feature  
  Bjork: Passions in a cold climate
 
Advertisement
         
主站蜘蛛池模板: 和日本免费不卡在线v | 日本私人色多多 | 一区二区三区在线 | 日本 | 毛片aaa | 精品午夜寂寞黄网站在线 | 日韩午夜在线视频 | av在线手机播放 | 在线欧洲成人免费视频 | 99视频免费在线观看 | 久久久国产成人精品 | 欧美成人资源 | 自拍偷在线精品自拍偷无码专区 | 国产精品久久久久久久福利院 | 日本美女黄色一级片 | 国产一线视频在线观看高清 | 国产精品美女一区二区 | 亚洲一区免费观看 | 亚洲精品综合一二三区在线 | 成人黄色一级毛片 | 亚洲欧美日韩综合在线一区二区三区 | 亚洲精品色一区二区三区 | 六月丁香婷婷天天在线 | 日本www视频在线观看 | 一区二区网站在线观看 | 国产男女 爽爽爽爽视频 | 99久久精品6在线播放 | 涩涩网站 | 久久精品8| 国产精品视_精品国产免费 国产精品视频久 | 国产成人一区二区三区视频免费 | 久久黄色一级视频 | 国产人成精品综合欧美成人 | 精品国产不卡一区二区三区 | 亚洲日本在线观看网址 | 男人扒开腿躁女人j | 成人久久影院 | 国产a级精品特黄毛片 | 亚洲中文字幕特级毛片 | 国产一级一级毛片 | 国产高清免费不卡观看 | 亚洲性在线观看 |