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  • Title: Time study of effects of pregnant mare's serum gonadotropin on surface characteristics of granulosa cells in rat ovaries.
    Author: Chang SC, Ryan RJ.
    Journal: Mayo Clin Proc; 1976 Oct; 51(10):621-3. PubMed ID: 966813.
    Abstract:
    A single injection of pregnant mare's serum gonadotropin (PMSG) into immature female rats was used to stimulate graafian follicle growth. The surface of granulosa cells in the growing follicles was examined at 12-hour intervals for 72 hours by scanning electron microscopy. Between 24 and 36 hours after injection of PMSG, microvillous processes appeared on the surface of the cells. These villous processes became fully developed at 48 hours and remained for at least 72 hours after PMSG injection. The significance of this PMSG-induced microvilli formation on granulosa cells is discussed.
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