Abstract
FEMALE sexual behaviour patterns are infrequent in adult castrated male rats unless very large doses of ovarian hormones are given1,2. The age at which the rats are castrated is important3–5. Male rats castrated later than 10 days of age and treated as adults with oestrogen in combination with progesterone displayed little feminine behaviour, but when castrated 1–5 days after birth the same hormone treatment caused more distinct female mating behaviour. Absence of androgen a short time after birth leads to behavioural feminization of the male rat.
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MEYERSON, B. Female Copulatory Behaviour in Male and Androgenized Female Rats after Oestrogen/Amine Depletor Treatment. Nature 217, 683–684 (1968). https://doi.org/10.1038/217683b0
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DOI: https://doi.org/10.1038/217683b0
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