三级aa视频在线观看-三级国产-三级国产精品一区二区-三级国产三级在线-三级国产在线

  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: 久久被窝电影亚洲爽爽爽 | 久久精品国产丝袜 | 一本大道一卡2卡三卡4卡麻豆 | 久久精品免视着国产成人 | 久久亚洲国产成人精品性色 | 91中文字幕视频 | 正在播放国产乱子伦视频 | 亚洲国产欧美国产第一区二区三区 | 日韩高清性爽一级毛片免费 | 99久久国产免费 - 99久久国产免费 | 国产精品v片在线观看不卡 国产精品v在线播放观看 | 一级特黄特色的免费大片视频 | 国产黄色免费在线观看 | 亚洲香蕉毛片久久网站老妇人 | 谁有免费的黄色网址 | 一级毛片 在线播放 | 久久精品国产99久久3d动漫 | 免费观看一级黄色片 | 亚洲国产成人久久精品图片 | 亚洲欧美国产精品第1页 | 三级毛片在线免费观看 | 国产在线成人一区二区 | 国产精品三级在线观看 | 一级黄视频 | 国产成人久久综合热 | 中文字幕最新中文字幕中文字幕 | 国产精品jvid在线观看 | 妖精视频免费入口 | 真实做爰对白录音 | 91精品国产免费久久久久久 | 女人被狂躁的免费视频网站软件 | 一级α一级α片免费观看网站 | 亚洲国产精品久久久久666 | 国产亚洲精品久久午夜 | 色婷婷欧美 | 国产精品视频久久 | 521香蕉永久播放地址 | 日韩专区亚洲国产精品 | 日本特黄色大片 | 日韩中文字幕精品视频在线 | 欧美 日产 国产精品 |