Original investigations into the clearance of spermatozoa after vasectomy

50 Years Ago Today

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Volume 111, Issue 1, Page 60


Martin Kathrins, M.D.


“The urologist and patient, with the cooperation of the laboratory performing the sperm counts, can determine within a few days after operation that aspermia has been produced and that the procedure has been successful.”

—Freund M, Davis JE. Disappearance rate of spermatozoa from the ejaculate following vasectomy. Fertil Steril 1969;20:163–70.

Fertility and Sterility

Editorial Office, American Society for Reproductive Medicine

Fertility and Sterility® is an international journal for obstetricians, gynecologists, reproductive endocrinologists, urologists, basic scientists and others who treat and investigate problems of infertility and human reproductive disorders.