Does the Male Stimulate Oestrogen Secretion in Female Canaries?

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Science  28 Apr 1961:
Vol. 133, Issue 3461, pp. 1354-1355
DOI: 10.1126/science.133.3461.1354


Female Border canaries treated with oestrogen during the nonbreeding season may build nests, regardless of winter lighting, temperature, and absence of partner. Incubation may follow completion of the nest although ovulation is suppressed. Reactions obtained in the breeding season suggest that the male does not initiate but accelerates oestrogen production through the stimulation he provides.