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anorgasmia
Anorgasmia, or Coughlan's syndrome,〔http://www.everydayhealth.com/sexual-health/0524/drug-restores-normal-orgasm-in-men.aspx〕 is a type of sexual dysfunction in which a person cannot achieve orgasm despite adequate stimulation. In males, it is most closely associated with delayed ejaculation. Anorgasmia can often cause sexual frustration. Anorgasmia is far more common in females (4.7 percent) than in males and is especially rare in younger men. The problem is greater in women who are post-menopause.〔
==Causes==
The condition is sometimes classified as a psychiatric disorder. However, it can also be caused by medical problems such as diabetic neuropathy, multiple sclerosis, genital mutilation, complications from genital surgery, pelvic trauma (such as from a straddle injury caused by falling on the bars of a climbing frame, bicycle or gymnastics beam), hormonal imbalances, total hysterectomy, spinal cord injury, cauda equina syndrome, uterine embolisation, childbirth trauma (vaginal tearing through the use of forceps or suction or a large or unclosed episiotomy), vulvodynia and cardiovascular disease.〔''For Women Only, Revised Edition: A Revolutionary Guide to Reclaiming Your Sex Life'' by Berman, J. Bumiller, E. and Berman L. (2005), Owl Books, NY. ISBN 978-0-8050-7883-1〕
A common cause of situational anorgasmia, in both men and women, is the use of anti-depressants, particularly selective serotonin reuptake inhibitors (SSRIs). Though reporting of anorgasmia as a side effect of SSRIs is not precise, studies have found that 17–41% of users of such medications are affected by some form of sexual dysfunction.
Another cause of anorgasmia is opiate addiction, particularly to heroin.〔http://www.atforum.com/pdf/europad/HeroinAdd6-3.pdf〕 Beat icon William S. Burroughs chronicled this problem (amongst many others) in his novel ''Naked Lunch''. About 15% of women report difficulties with orgasm, and as many as 10% of women in the United States have never climaxed.〔Giustozzi AA. Sexual dysfunction in women. In: Ferri FF. Ferri's Clinical Advisor 2010. St. Louis, Mo.: Mosby; 2009. ()〕 Only 29% of women always have orgasms with their partner.〔http://www.iub.edu/~kinsey/resources/FAQ.html#orgasm〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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