Genotype and Sex Drive in Intact and in Castrated Male Mice

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Science  31 Jul 1964:
Vol. 145, Issue 3631, pp. 514-515
DOI: 10.1126/science.145.3631.514


Male mice of two inbred strains and one hybrid strain were observed for sexual behavior for 42 consecutive days. Half the males of each strain were then castrated, and daily testing was continued until the ejaculatory reflex was lost. Strain differences were found in ejaculatory frequency both before and after castration.