title: Effect of oestrogenic, and androgenic and gestagenic hormones on the gametogenesis (oogenesis and spermatogenesis) in the snail Helix pomatia.
abstract: In the ovotestis of Helix pomatia both oogenesis and spermatogenesis were influenced by treatments with steroid hormones produced in the gonads of higher vertebrates. Testosterone influenced gametogenesis to a small degree. Progesterone and oestrone-acetate at first stimulated ovogenesis, but they also acted on spermatogenesis. All three hormones examined influenced oogenesis in a conspicuous and significant way, while their effect on spermatogenesis was indistinct.
mesh_terms: D000818:Animals; D004970:Estrone / Q000494:pharmacology*; D005260:Female; D006372:Helix, Snails / Q000187:drug effects / Q000502:physiology*; D008297:Male; D009865:Oocytes / Q000187:drug effects; D009866:Oogenesis / Q000187:drug effects*; D011374:Progesterone / Q000494:pharmacology*; D013090:Spermatocytes / Q000187:drug effects; D013091:Spermatogenesis / Q000187:drug effects*; D013094:Spermatozoa / Q000187:drug effects; D013739:Testosterone / Q000494:pharmacology*
chemical_list: D004970:Estrone; D013739:Testosterone; D011374:Progesterone