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Abstract
The differentiation of rat seminiferous tubules have been studied in 13 to 19 days old. Testicular weight and tubular cross-sectional area were more than doubled during this period. The percentage of tubules with more than 10 primary spermatocytes increased from 4% to 90%, and the lanthanum excluding ability of the inter-Sertoli cell junctions (the blood-testis barrier) showed a similar increase but two days later. ABP production in vitro increased more than twentyfold from day 13 to day 19 of age. It is concluded that the differentiation of Sertoli cell function and the appearance of primary spermatocytes are temporally correlated which supports the assumption that the function of the Sertoli cells is important for initiation and maintenance of spermatogenesis.
Published Version
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