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The most widely held theory of. testicular development from birth to puberty was that of Charny et al. (1952), who distinguished three phases in the development of the testicle: the static phase, the growth phase and the maturation phase. Städtler (1975) rejected the theory of development in phases, on the grounds that the seminiferous tubule showed a continuous increase in diameter and in the number of spermatogonia up to the eleventh year. His results have been confirmed in this study. The diameter of the seminiferous tubule increases in linear fashion until the twelfth year, when a rapid increase takes place, following the appearance of the lumen. The number of spermatogonia shows an increase parallel to that of the tubule diameter.
KeywordsSertoli Cell Leydig Cell Seminiferous Tubule Lamellar Body Primary Spermatocyte
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