Meiotic figures in the testicular biopsy of subfertile males.

The phases and sequence of meiotic division are herein reviewed and illustrated as they occur in the human testis. Normally all phases of meiosis can be identified, and arrest at a phase is indicative of faulty spermatogenesis. The correlation of these arrest patterns with the clinical course and response to clinical therapy is now in progress. These meiotic studies can be undertaken in any laboratory with cytogenetic capabilities, and this study is intended to serve as a base line illustration of the normal.