Abstract:

In this study, we have demostrated that there were three stages in the development of mice testes after birth, during the first week, the seminiferous tubules consisted of simple genetic epithelium that was in a state of relative rest. From the second tothe fourth week, the epithelium of seminiferous tubules proliferated into more layers, including sperma togonium,spermatocytes, and spermatids, and a few spermatozoa were found in the epididymis. Afterthe fifth week many spermatozoa were found in tubules of epididymies. We thought this stage presented sex maturity of mice. Alkaline phosphatase and aminopeptidase localized in epithelium of seminiferous tubules in first week. From the second week, the positive reactivity became weak or negative. However, after the end of the second week, these enzymes could be found around a tissue layer of the seminiferous tubules. We would study further the reason for these changes.

Key words: mice testes, postnatal development of testes, morphology histochemistry