Copulatory Behavior Can Inhibit Pregnancy in Female Rats

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Science  19 Jun 1970:
Vol. 168, Issue 3938, pp. 1480-1482
DOI: 10.1126/science.168.3938.1480


If female rats received genital stimulation soon enough after their male partners had ejaculated, sperm transport and subsequent pregnancy were inhibited. Manual stimulation by the experimenter or five intromissions by a male rat were sufficient stimuli to reduce the number of sperm found in the uterus and to reduce the number of uterine implantation sites.

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