Declining worldwide sperm counts: disproving a myth.

This article explores in detail the issue of the alleged decline in semen quality. The impetus for a comprehensive re-evaluation at this time is threefold: (1) the potential impact of a real decline in semen quality and subsequent human fertility is a priori critical to human welfare; (2) governments have begun to enact "anti-endocrine disruptor" legislation that is based, in part, on selected portions of the published data about semen quality; and (3) confusion and misinformation about semen quality remain widespread in lay and professional circles.