When I was a student at Kyoto University in the early 1950s, experimental morphology of animal development ... and he showed us how oocyte maturation and ovulation can be induced in a piece ...

Time-lapse of an exemplary oocyte labeling both cytoplasm (bright area) and yolk granules (dark area) during the first four cleavage cycles and imaged by confocal microscopy. As the zebrafish egg ...