title: [Germ cell cycles during sex inversion in chick embryos].
abstract: A study was made of the germ cell cycles of 11 days old embryos injected male or female hormones on the 4 th day of incubation. The cell cycles duration in genetically male 11 days embryos treated with esradiol-benzoate was close to that registered in oogonia of both treated and non-treated female embryos of the same age. The testosterone propionate injection caused an acceleration of the genetically male sex cell proliferation and a decrease of the reproduction rate of the female sex cells. It is proposed that under normal conditions female sex hormones inhibit a hypothethic factor that determines the decrease of cell proliferation during the male embryo development.
mesh_terms: D000818:Animals; D002642:Chick Embryo; D004958:Estradiol / Q000494:pharmacology*; D005260:Female; D005854:Germ Cells / Q000187:drug effects*; D008297:Male; D008938:Mitosis / Q000187:drug effects; D010507:Periodicity; D013739:Testosterone / Q000494:pharmacology*
chemical_list: D013739:Testosterone; D004958:Estradiol
vernacular_title: Kletochnye tsikly goniĭ pri inversii pola u kurinogo émbriona