Pineal Gland: Influence on Development of Copulation in Male Rats

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Science  01 Nov 1968:
Vol. 162, Issue 3853, pp. 586-587
DOI: 10.1126/science.162.3853.586


Male rats reared in constant darkness, pinealectomized 3 days after birth, and tested for copulation starting at 24 days of age, mounted receptive females more frequently and showed pelvic thrusting at an earlier age than littermate controls.