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Human Reproduction, Vol. 8, No. 8, pp. 1251-1258, 1993
© 1993 European Society of Human Reproduction and Embryology

research-article

Andrology: Effects of multiple ejaculations after extended periods of sexual abstinence on total, motile and normal sperm numbers, as well as accessory gland secretions, from healthy normal and oligozoospermic men

T.G. Cooper, C. Keck, U. Oberdieck and E. Nieschlag1

Institute of Reproductive Medicine of the University, (WHO Collaborating Centre for Research in Human Fertility), Steinfurter Strasse 107 D-48149 Munster, Germany

Correspondence: 1To whom correspondence should be addressed

Four healthy donors provided three ejaculates on one day to deplete their sperm reserves and also after abstention periods of 1, 2, 4, 7, 10 and 14 days. The percentage of spermatozoa that were normally formed, progressively motile and which swelled in hypotonic medium remained unchanged throughout this period and the increase in total numbers of viable spermatozoa for 10 days prompted a comparison of seven donors and six oligozoospermic men. Multiple ejaculations after 10 days of abstinence for the patients with low normal, motile sperm numbers increased the total number, number of normal and number of motile spermatozoa by a mean of 230, 370 and 520%, respectively.

Key words: abstinence/accessory gland secretions/multiple ejaculations/oligozoospermia


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