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The Existence of a Luteolytic Hormone in the Uterus of the Guinea-Pig

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Reproduction in the Female Mammal

Abstract

Ovulation and corpus luteum formation recur at approximately 16-day intervals in the guinea-pig, at a time when regression of the previous set of corpora lutea is marked. Loeb (1911a, b) recorded that the corpora lutea are fully developed from the histological point of view from the sixth day after ovulation, and that regressive changes can be detected on the tenth day. When the changes in the volume of the corpora lutea during the cycle were traced by Rowlands (1956), Perry and Rowlands (1962a) and Bland and Donovan (1966a), it was found that the maximum size is reached at about the eleventh or twelfth days (Figure 1). Thereafter regression sets in and is rapid. It is perhaps unfortunate that the morphological changes in the corpora lutea may not be correlated with their functional state for Rowlands and Short (1959) found that the concentration of progesterone in luteal tissue 11–13 days after ovulation (7·7 µg/g) is half that at 6 days (16·2 µg/g) despite the lack of histological modification in the interval.

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© 1967 Springer Science+Business Media New York

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Donovan, B.T. (1967). The Existence of a Luteolytic Hormone in the Uterus of the Guinea-Pig. In: Lamming, G.E., Amoroso, E.C. (eds) Reproduction in the Female Mammal. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-6377-2_18

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  • DOI: https://doi.org/10.1007/978-1-4899-6377-2_18

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4899-6187-7

  • Online ISBN: 978-1-4899-6377-2

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