Titlebook: Neurobiology of Reproduction in the Female Rat; A Fifty-Year Perspec John W. Everett Book 1989 Springer-Verlag Berlin Heidelberg 1989 Endok

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Introduction, The relationship was recognized in a general way between behavioral estrus, on the one hand, and ovulation, corpus-luteum formation and pregnancy on the other. Aside from cats and rabbits, in which ovulation is provoked by copulation, spontaneous ovulation was evident in familiar species. Rhythmic

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Vaginal Cytology and Ovarian Status,author’s laboratory during approximately 5 decades. It is appropriate to consider criteria for evaluating the smears and their relationship to ovarian function. Our criteria are based on the five stages of the estrous cycle of rats described by Long and Evans (1922) and presented here in Table 1 ess

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Steroid Regulation of the Ovarian Cycle,came available (cf. Burrows 1949). These negative effects were the basis for the “push-pull” hypothesis of pituitary-gonadal interaction proposed by Moore and Price (1930, 1932). A positive, stimulative effect of gonadal hormones in promoting puberty was noted by Engle (1931), however, and several w

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Summary,ence between the . and the . of the cycle. The 4-day cycle tends to be the most frequent, with the 5-day cycle a normal variant. Spontaneous persistent vaginal estrus (SPE), an acyclic state occurring in older adult rats, reflects the presence in the ovaries of large vesicular follicles failing to l