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[Correspondence] Unexplained infertility

We read with interest the findings by Cynthia Farquhar and colleagues (Feb 3, p 441),1 and the accompanying Comment,2 relating to the use of intrauterine inseminations (IUIs) in the treatment of so-called unexplained infertility. Although we applaud the basic hypothesis behind the study, we object to the design and, in particular, the interpretation of the study. We also decry the uncritical acceptance of the reported findings and interpretation in the accompanying editorial.