| umls-concept:C0037866 | skos:definition | MSH: Euploid male germ cells of an early stage of SPERMATOGENESIS, derived from prespermatogonia. With the onset of puberty, spermatogonia at the basement membrane of the seminiferous tubule proliferate by mitotic then meiotic divisions and give rise to the haploid SPERMATOCYTES.,NCI: The primitive differentiated male gamete which gives rise to a spermatocyte. (MeSH) | lld:umls |
