Internal Fertilization This occurs in most bony fish, many reptiles, some cartilaginous fish, most amphibians, two mammals, and all birds. ... In ovoviviparity, fertilized eggs are retained in the female, but the embryo obtains its nourishment from the egg's yolk and the young are fully developed until they are hatched
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Internal Fertilization This occurs in most bony fish, many reptiles, some cartilaginous fish, most amphibians, two mammals, and all birds. ... In ovoviviparity, fertilized eggs are retained in the female, but the embryo obtains its nourishment from the egg's yolk and the young are fully developed until they are hatched