Male Infertility

Male infertility may be due to:

  • A decrease in sperm count
  • Sperm being blocked from being released
  • Sperm that do not work properly

Male infertility can be caused by:

  • Environmental pollutants
  • Being in high heat for prolonged periods
  • Birth defects
  • Heavy use of alcohol, marijuana, or cocaine
  • Too little or too much hormones
  • Impotence
  • Infection
  • Older age
  • Cancer treatments, including chemotherapy and radiation
  • Scarring from sexually transmitted diseases, injury, or surgery
  • Retrograde ejaculation
  • Smoking
  • Use of certain drugs, such as cimentidine, spironolactone and nitrofurantoin

In healthy couples under age 30 who have sex regularly, the chance of getting pregnant is about 25 - 30% per month.

A woman's peak fertility occurs in her early 20s. After age 35 (and especially 40), the chances that a woman can get pregnant drop considerably.