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Sexual behavior of male rats was studied in a short-term endogenous hyperprolactinaemic condition. Hyperprolactinaemia was induced by grafting two pituitary glands under the kidney capsule. Five days after operation homografted animals, as compared to the sham operated, displayed an enhancement of several parameters of copulatory behavior. In particular, significant reductions in the mount and intromission latencies were observed. The stimulation of sexual behavior of male rats by short-term hyperprolactinaemia might be due to an enhancement of dopaminergic transmission in specific brain areas by prolactin (PRL).
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Drago et al. (1981) studied this question.
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