In Vitro Evaluation of Sperm Quality: An Opinion

E valuation of sperm quality usually is linked with the desire to predict fertility in a clinical setting or to enable maximum number of offspring from a valuable * Ramifications of different definitions of fertility are beyond the goal of this paper, but measures used to quantify success or failure range from binding of sperm to investments of the oocyte, detection of embryonic tissues 1-15 days after fertilization in vitro or in vivo, to birth of a live offspring.The attribute measured, and especially its position in the temporal sequence, will influence success of any attempt to predict fertility.Similarly, the time-frame for success (e.g., one cycle or I year) affects predictions.t Arbitrary values selected by the authors to reflect the data base frequently available and extent of discrimination desired.Other values might be equally or more appropriate.