Abstract

This paper concerns the differentiation process of germ cells from oogonia to primary follicles in the lizard Podarcis sicula. The study was carried out at the morphological level and using a cytophotometric analysis for determining the number of differentiating germ cells undergoing degeneration. The progressive disorganization of the germ cell clusters during the early diplotene stage and the role played by the prefollicular cells during this process are described. Oocyte degeneration has been observed between the mid-zygotene and the early diplotene stages. When the primary follicle (oocyte plus follicular cells) is being formed, the degeneration process stops and the oocyte undergoes regular growth and ovulation.

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