CHANGES IN THE REPRODUCTIVE ORGANS OF COLD-EXPOSED AND LIGHT-DEPRIVED FEMALE HAMSTERS (MESOCRICETUS AURATUS)

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Abstract
After removal of the eyes or exposure to cold (6° C) female golden hamsters had smaller uteri than controls. If animals were both blinded and cold-exposed the effects on the reproductive organs were additive. Removal of the pineal gland prevented uterine regression in light-deprived hamsters but did not delay or prevent the regressive response in cold-exposed animals. Although the ovaries of cold-exposed animals did not change in size, they displayed marked interstitial hypertrophy and had fewer follicular elements and corpora lutea. It is suggested that blinding and cold-exposure each induce a similar hormonal imbalance.

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