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. 1976 Dec 15;34(3):265-70.
doi: 10.1007/BF00295289.

Studies on frequency of Y chromatin in human sperm

E Schwinger, J Ites, B Korte

Studies on frequency of Y chromatin in human sperm

E Schwinger et al. Hum Genet. .

Abstract

The preparation and evaluation of human ejaculate smears on cover glasses enables double-sided examination of the individual sperm heads in the fluorescence microscope. By this method of observation the frequency of Y chromatin in the ejaculates of 19 probands increased significantly to between 1.7 and 6.3%. However, the frequency of 50% Y chromatin-positive sperms theoretically to be expected is not found by applying this technique. Furthermore, sexual abstention of at least 14 days leads to a statistically significant decrease of the frequency of Y chromatin. These observations could explain why the data on Y chromatin frequency reported in the literature appear so inconsistent.

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