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Updates are el chat added as important new information is published. The literature review for version 14.1 is current through January 2006; this topic was last changed on March 26, 2003. The next version of UpToDate (14.2) will be released in June 2006. These materials el chat are for your general information and are not a substitute el chat for medical advice. You should contact your physician or other healthcare provider with any questions about your health, treatment, or care. Do not contact UpToDate or the physician authors of these materials.Infertility is defined as a couple's inability to become pregnant after one year of unprotected intercourse. In any given year, about 15 percent of the couples in North America and Europe who are trying to conceive are infertile.The fertility of a couple depends on several factors in both the male and female partner. Among all cases of infertility, about 20 percent can be traced to male factors, 38 percent can be traced to female factors, 27 percent can be traced to factors in both the male and female partners, and 15 percent cannot be traced to obvious factors in either partner.When
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