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Changes in the number of Aps, Apl and B1 spermatogonia per 100 Sertoli cells (mean ± SE) during the cycle of the seminiferous epithelium in the adult rhesus monkey (n = 4).
Note peak numbers of Apl in Stages VIII and IX of the cycle were followed by appearance of the first generation of differentiated B spermatogonia in Stages X–XII. The total number of Ap (i.e. Aps + Apl), did not change throughout the cycle (analysis of variance, P > 0.05).
