Figure 2. Morphology of the seminiferous tubules from the control (C), heat-treated (H) and heat-treated plus electroacupuncture (H⁺EA) rats. (A) Morphological changes in the seminiferous tubules of the rat testis collected at different time points (day 1, 9, 25, 37, 46, 56 and 79). On day 9 (H9), the germinal epithelium was reduced to spermatogonia or primary spermatocytes. Round spermatids were all missing (seminiferous tubule marked with asterisk). Spermatogenesis gradually recovered from day 37 (H37 and H⁺EA37). Scale bar = 100 µm.