Erectile Dysfuncton is also known as impotence, and is more common in older males than in younger. It is the inability for a man to achieve an erection.

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Andrology : the site for impotence, infertility, male menopause (andropause), and other male sexual and reproductive disorders (Urology). Also covers transsexualism, sex change operations, Peyronie's disease, and surgery for penis size enhancement ...

BUPA health information factsheet - erectile dysfunction (impotence) affects one in ten men, find out the common causes and treatment ...

Dear Dr. Dave, I'm 18 years old. I've never had a problem with impotence, never had trouble achieving an erection. But about 2 weeks ago, before sex with my girlfriend, it was very very difficult to get an erection. Ever since, thats the only thing on my mind. I find myself constantly worrying about impotence. When I'm intimate I find myself doing nothing but worrying. I do get erections, it ...

Impotence is a consistent inability to sustain an erection sufficient for sexual intercourse.

Impotence - what you need to know ...