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- W2079307795 abstract "The diameters of oocytes in follicles having a single layer of granulosa cells were measured hi four week old mice of various strains. There is a unique population of these follicles hi strains LT/Sv and C58/J in which the oocytes are significantly larger than the oocytes in single granulosa cell layered follicles of other common strains (C57BL/6J, BALB/cJ, and DBA/2J). These unique follicles are referred to as granulosa cell deficient (GCD) follicles since oocytes of these sizes are usually found in follicles with more than a single layer of granulosa cells. The parthenogenetic embryos that give rise to ovarian teratomas in strain LT/Sv are usually found in GCD-follicles. Some of the ova of strains LT/Sv and LTXBP, but not the ova of the other strains, are capable of spontaneous parthenogenetic activation after meiotic maturation. Although the ovulated ova of strain LTXBP are capable of spontaneous parthenogenetic development, the frequency of GCD-follicles and teratocarcinogenesis is low. Therefore, the frequency of ovarian teratocarcinogenesis is correlated with the simultaneous occurrence of two atypical conditions: first, the capability of the matured ova to undergo spontaneous parthenogenetic activation and, second, the high frequency of GCD-follicles. GCD-follicles containing oocytes with a diameter greater than 65 μm were studied by electron microscopy. The follicles are usually enclosed within a layer of flattened theca-like cells. A basal lamina separates these cells from a single layer of cuboidal granulosa cells. Granulosa cell processes traverse the zona pellucida to contact the oocyte which shows ultrastructural characteristics typical of oocytes in the final growth stages. It is proposed that the GCD-follicles are competent to participate in the normal functions of follicular cells relating to oocyte growth and meiotic maturation." @default.
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- W2079307795 date "1979-02-01" @default.
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- W2079307795 title "Granulosa Cell Deficient Follicles" @default.
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- W2079307795 doi "https://doi.org/10.1111/j.1432-0436.1979.tb00996.x" @default.
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