[Effect of gonadal extract of Helix aspersa Müller in the dominant male stage on in-vitro gametogenesis in juvenile and adult animals].

Juvenile and adult gonads of Helix aspersa Müller have been cultivated with or without gonadal extract of animals at the male stage. With this extract a better survival of the germinative epithelium and development of the different stages of meiosis in the male cells are observed.