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Abstract
To study the spermatogenic potential of the early prepubertal inguinal testis and the effect of temperature on spermatogenesis, the levels of incorporation of 3H-thymidine and 14C-uridine into the testicular tissue were studied at 31 °C and 37 °C in vitro and compared with those of scrotal (descended) testis. 3H-thymidine incorporation into the inguinal testicular tissue at 31 °C, which is close to normal testicular temperature, was significantly lower than that of the scrotal testis. There were no significant differences in 14C-uridine incorporation between inguinal and scrotal testis at that temperature. At 37°C, which is close to normal body temperature, 3H-thymidine and 14C-uridine incorporation into the tissues of inguinal and scrotal testes was significantly higher than at 31 °C. It would appear that DNA synthesis of the inguinal testis is lower than that of the scrotal testis at 31 °C, and higher temperature, at least for a short while, did not contribute to the impairment of spermatogenic potential in early prepubertal inguinal testis.