Long Island IVF | Causes of Infertility

Causes of Infertility


Infertility is defined as the inability to conceive after one year of properly timed, unprotected intercourse in women under 35 years of age, and after six months of unprotected intercourse for women 35 and older. It affects approximately 13-14% of reproductive-aged couples.

The probability of a fertile couple conceiving per month is 20%, and after one year 80% of couples will have conceived. The cumulative probability increases as they continue to try over a period of many months. Fertility diminishes as a woman ages because the number and quality of a woman's eggs, as well as the probability that those eggs will be genetically normal, declines with age.

The cause of infertility can be easily identified in some couples. In other couples the cause is much less clear, and multiple factors may contribute. The major recognized causes of infertility are listed in the table below.


Cause Couples Women
Male 35% ----------
Ovulatory 15% 40%
Tubal 35% 40%
Other 5% 10%
Unexplained 10% 10%


Common Diagnoses

  • Female Infertility
  • Ovulatory dysfunction
  • Tubal Disease
  • Cervical Factor
  • Uterine Factor
  • Endocrine Abnormalities
  • Unexplained Infertility

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