CONTROL OF SEX RATIO IN RABBITS BY ELECTROPHORESIS OF SPERMATOZOA

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Abstract
The use of electrophoresis as a means of separating male-producing and female-producing spermatozoa in rabbits was first attempted by V. N. Shreder (sometimes spelled "Schroder") in 1932-1949. She observed that the offspring of doses artificially inseminated with anode-migrating spermatozoa were predominantly female, while inseminations with cathode spermatozoa produced predominantly male offspring. Shreder proposed, therefore, that anode-migrating sperm cells are X-chromosome-bearing, and cathode-migrating sperm cells are Y-chromosome-bearing. Her results show successful prediction of sex, on the basis of the above hypothesis, 80% of the time. The results reported here, while differing in some aspects from those of Shreder, lend credence and support to her work. It appears that the results and analyses have in some measure confirmed the belief that the control of the sex ratio is a real possibility.

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