Coital behavior in dogs: Effects of estrogen on mounting by females

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Female dogs mounted other females more frequently when the 2nd bitch was in estrus, but the hormonal state of the mounting individual had little influence upon mount frequency. Estrogen rendered a female more provocative or stimulating and more cooperative or receptive to mounting by another dog. During heterosexual tests, estrous females tended to mount males selectively, responding readily to some masculine partners and never mounting others. In limited tests anestrous females did not mount males. Estrogen facilitated expression of specific feminine copulatory reactions and increased tendencies to display various positive social responses to dogs of either sex. Whether or not the hormone directly enhanced the female's tendency to mount a conspecific partner was not determined. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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