Evidence indicate that oocyte maturation or germinal vesicles breakdown (GVBD) in amphibians is induced by progesterone in a time and doses dependent manner. Hypothesis: progesterone is able to also induce GVBD in fish. Experiment: Materials: fish ovarian oocytes, progesterone (dissolved in EtOH) various doses (1; 10; 100 µg/ml), culture media, […]