In about 10% of all causes, there is no identifiable cause for infertility, and in a small number, the problem is related to infrequent and poorly timed intercourse. Otherwise, the most common causes of infertility include the following:
Both Sexes:
Both Sexes:
- Hormonal disorders (ovarian or testicular abnormalities, pituitary failure, adrenal or thyroid disease)
- Gonorrhea, chlamydia, and other sexually transmitted diseases.
- Obesity and excessive thinness
- Alcoholism and other drug abuse, and excessive smoking
- Genetic disorder
- Immunological factors
- Failure to ovulate (including menopause)
- Pelvic inflammatory disease and tubal scarring
- Endometriosis
- Uterine febroids
- Uterine and cervical malformations
- Hostile cervical mucus
- Prenatal exposure to DES (a synthetic estrogen prescribed to prevent miscarriage until the late 1960s)
- Turner's syndrome, a genetic disorder in which a women has three rather than two X-Chromosomes
- Low sperm count or other sperm abnormalities
- Hydrocele or variocele
- Undescented or Underdeveloped testicles
- Impotence or ejaculatory disorders
- Prostatitis
- Testicular injury or inflammation
- Klinefelter's syndrome, a genetic disorder in which a man has more than one X-Chromosomes
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