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Samples of plasma and pituitary homogenates collected from female Mongolian gerbils (3-4, 11-13 and 20-25 month-old) at various stages of the estrous cycle were analyzed by radioimmunoassay for luteinizing hormone (LH), follicle-stimulating hormone (FSH) and prolactin (Prl). Plasma and pituitary LH concentrations were similar in all three age groups. Plasma FSH concentrations tended to increase with age while plasma Prl concentrations remained unchanged. Pituitary concentrations of FSH and Prl were variable between the age groups depending upon the stage of the estrous cycle. The inability of older gerbils to produce young appears to result primarily from age-related changes occurring in the uterus rather than from alterations in the hypothalamic-hypophyseal complex.
T A Parkening, and
T J Collins, and
E R Smith
November 1975,
Horumon to rinsho. Clinical endocrinology,
T A Parkening, and
T J Collins, and
E R Smith
August 1990,
Nihon Naibunpi Gakkai zasshi,
T A Parkening, and
T J Collins, and
E R Smith
December 1974,
Journal of animal science,
T A Parkening, and
T J Collins, and
E R Smith
January 1978,
Canadian journal of zoology,
T A Parkening, and
T J Collins, and
E R Smith
November 1992,
Sangyo igaku. Japanese journal of industrial health,
T A Parkening, and
T J Collins, and
E R Smith
October 1972,
Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.),
T A Parkening, and
T J Collins, and
E R Smith
October 1972,
Acta obstetrica et gynaecologica Japonica,
T A Parkening, and
T J Collins, and
E R Smith
May 1980,
Journal of reproduction and fertility,
T A Parkening, and
T J Collins, and
E R Smith
January 2006,
Methods in molecular biology (Clifton, N.J.),
T A Parkening, and
T J Collins, and
E R Smith
April 1997,
Experimental animals,
