A series of articles in Human Reproduction Update showed that infection is the most common cause of male infertility and that standard tests for infertility often do not find the infection.
When evaluating a male for infertility, doctors check sperm count and sperm mobility. If a man's ejaculate contains fewer than 50 million sperm, he is infertile, and the most common cause of reduced sperm count is infection. Infection is also the most common cause of inactive sperm. Doctors don't have a dependable way to measure other causes of infertility such as changes in the sperm membrane and DNA content. These studies stressed that prostate and urinary tube infections that are allowed to continue for several months or years can cause permanent infertility. Because infections are the most common known cause of infertility and the only way to cure these infections is to treat both partners, it may be reasonable to treat all infertile couples with doxycycline or Zithromax for several weeks.
More on infertility
1) FH Comhaire, AMA Mahmoud, CE Depuydt, AA Zalata, AB Christophe. Mechanisms and effects of male genital tract infection on sperm quality and fertilizing potential: the andrologist's viewpoint. Human Reproduction Update, 1999, Vol 5, Iss 5, pp 393-398.
2) FR Ochsendorf. Infections in the male genital tract and reactive oxygen species. Human Reproduction Update, 1999, Vol 5, Iss 5, pp 399-420.
3) W Weidner, W Krause, M Ludwig. Relevance of male accessory gland infection for subsequent fertility with special focus on prostatitis. Human Reproduction Update, 1999, Vol 5, Iss 5, pp 421-432.
4) J Paavonen, W EggertKruse. Chlamydia trachomatis: impact on human reproduction.Human Reproduction Update, 1999, Vol 5, Iss 5, pp 433-447. 5) A Kamischke, E Nieschlag. Treatment of retrograde ejaculation and anejaculation. Human Reproduction Update, 1999, Vol 5, Iss 5, pp 448-474.
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