[Sperm function tests].

Basing on the newer literature a survey is given concerning several methods of functional characterization of the spermatozoa. The evaluation of sperm movement characteristics, the examination of sperm-cervical mucus interaction in vitro, the zona-free hamster egg penetration test and the measurement of adenosine triphosphate levels may provide clinically valuable information. The combination of information from the conventional semen analysis with these tests of sperm function was accurate in predicting the in vivo fertilizing ability of an ejaculate. The tests are more technique consuming and expensive, therefore they are not widely available in the andrological practice.