Elektronenmikroskopische Untersuchungen über die Entwicklung des Tubulus seminiferus unmittelbar nach der Geburt bis zum vollendeten ersten Lebensjahr

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Abstract
The development of the seminiferous tubule in the first year of life was studied with the electron microscope in five biopsies of normal testes. When HCG stimulation ceases, the fetal Sertoli cell changes into the Sa-Sertoli cell. The possibility of the fetal Sertoli cell having a hormone producing role is discussed. Gonocytes can be detected until the third month post natum. In addition to the gonocytes fetal, transitional, Ap and Ad spermatogonia are also present in the first year of life.

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