[Unexplained sterility: practical management].

The treatment of unexplained sterility is a gamble, since by definition it is sterility in which investigation does not show any abnormality in the couple. Sterility cannot be regarded as "unexplained" until after an investigation of which the author describes the progression from the simplest to the most complicated. Uncertainties, paradoxes and controversies will still trouble the unexplained sterilities, within the limits of our means of investigation, for a long time to come.