Hum. Reprod. Advance Access originally published online on May 9, 2006
Human Reproduction 2006 21(8):1951-1955; doi:10.1093/humrep/del135
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NEW DEBATE |
Unexplained infertility: Does it really exist?
1 Center for Human Reproduction, New York, NY 2 Foundation for Reproductive Medicine, Chicago, IL 3 Department of Obstetrics and Gynecology, Yale University School of Medicine, New Heaven, CT and 4 Department of Epidemiology and Social Medicine and Department of Obstetrics and Gynecology & Womens Health, Albert Einstein College of Medicine, Bronx, NY, USA
5 To whom correspondence should be addressed at: Center for Human Reproduction, 21 East 69th Street, New York, NY 10021, USA. E-mail: ngleicher{at}thechr.com
Recent medical literature has quite extensively addressed the use of various terminologies within the field of reproductive medicine. This discussion has, however, so far overlooked the fact that one of the most frequently made diagnosis, so-called unexplained infertility (UI), not only didactically but, even more importantly, clinically, appears unsustainable as an independent diagnosis. The arguments in support of such a contention are manifold. The diagnosis of UI is highly subjective. It is dependent on which diagnostic tests have been performed (or have been omitted) and at what level of quality. Paradoxically, a diagnosis of UI will, therefore, be more often reached if the diagnostic workup is incomplete or of poor quality. Supported by evidence from the literature, the argument is made that the conditions, most frequently misdiagnosed as UI, are endometriosis, tubal infertility (especially distal and peritubal disease), premature ovarian ageing and immunological infertility. Because of the obvious unreliability of a diagnosis of UI and the widely reported unevenness in diagnostic criteria, we recommend the abandonment of UI as a formal infertility diagnosis. Better efforts to reach infertility diagnoses more accurately should improve the diagnostic accuracy of hitherto frequently missed diagnoses, which often falsely have led to a diagnosis of UI.
Key words: endometriosis/immunological infertility/ovarian ageing/tubal infertility/unexplained infertility
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