ABSTRACT
A detailed description of the morphology and histology of dolphin and whale ovaries and reproductive tracts has been reviewed (Harrison 1969, 1977; Green 1977; Tinker 1988; Schroeder 1990). Ovarian changes with respect to age, season, and reproductive activity in cetaceans have not been fully understood. It is thought that cetacean ovaries are similar to those of other mammals. The ovary is the site of oocyte maturation. Maturation results in morphological changes in the ovary and is regulated by several hormones throughout the ovarian cycle. Folliculogenesis and oogenesis are important events preceding the release of the mature oocyte (ovulation), as well as for in vitro oocyte maturation, which is necessary for assisted reproductive technologies.
