cellular
• variable depletion of spermatogenic cells is seen with testes containing both germ cell free seminiferous tubules and unaffected tubules
• the percentage of germ cell free tubules varied from 30% to 100%; however unlike females gem cell depletion did no increase with age
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• at E10.5 and E12.5 the late migratory and postmigratory primordial germ cell populations are reduced; however the size of the premigratory (E6.5) and early migratory (E9.5) primordial germ cell populations are normal
• up to 70% of primordial germ cells undergo apoptosis before colonizing the gonadal ridges
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reproductive system
• variable depletion of spermatogenic cells is seen with testes containing both germ cell free seminiferous tubules and unaffected tubules
• the percentage of germ cell free tubules varied from 30% to 100%; however unlike females gem cell depletion did no increase with age
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• at E10.5 and E12.5 the late migratory and postmigratory primordial germ cell populations are reduced; however the size of the premigratory (E6.5) and early migratory (E9.5) primordial germ cell populations are normal
• up to 70% of primordial germ cells undergo apoptosis before colonizing the gonadal ridges
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• at 3 weeks of age the number of primordial follicles is reduced 25 - 100-fold
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• at 6 weeks of age hardly any primordial follicles and very few growing follicles are seen
• after 6 weeks of age ovarian follicles are mostly absent
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• seminiferous tubules lacking germ cells are reduced in diameter
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• seen around seminiferous tubules lacking germ cells
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• fertility is variably impaired depending on the efficiency of Cre recombination (averaging about 60%)
• males that do produce offspring pass on the unrecombined allele
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endocrine/exocrine glands
• at 3 weeks of age the number of primordial follicles is reduced 25 - 100-fold
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• at 6 weeks of age hardly any primordial follicles and very few growing follicles are seen
• after 6 weeks of age ovarian follicles are mostly absent
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• seminiferous tubules lacking germ cells are reduced in diameter
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• seen around seminiferous tubules lacking germ cells
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embryo
• clusters of apoptotic primordial germ cells are detected on the genital ridge at E10.5
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