Estrous Synchrony in Mice: Alteration by Exposure to Male Urine

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Science  19 Jun 1964:
Vol. 144, Issue 3625, pp. 1469
DOI: 10.1126/science.144.3625.1469


Exposure of grouped, virgin female laboratory mice to urine from male mice for 2 days prior to pairing significantly altered the expected pattern of estrous synchrony. A higher proportion of mice exposed to male urine attained estrus during the 2 days after pairing than did mice exposed to female urine or control mice.