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It is now well recognized that in the clinical study of sterility in mated pairs of human beings a thorough examination of the male partner's semen is obligatory, and particularly a study of the morphologic and physiologic characteristics of the spermatozoa. There is also a growing recognition of the fact that detailed investigation of the individual germ cells may possibly be illuminating in cases of genetically grounded diseases and defects. This book is a useful contribution to the methodology of this field of inquiry. In addition to detailed instructions regarding the fixing, staining and measuring of sperm samples, elementary biometric technics are explained and exemplified. The author's own studies of individual variation in spermatozoa embodied in this book are based on the examination of more than 20,000 sperms. As strictly biometric indexes of quality (in the sense of fertilizing power) of spermatozoa, chief depen- dence is placed on (a) the
Neue biometrische Untersuchungen von Spermien und Fertilität. JAMA. 1938;111(25):2330. doi:10.1001/jama.1938.02790510078033
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