ABSTRACT
Survival of any species of a living organism lies in its ability to regenerate itself as each species has a limited period of life on Earth. Age at maturity is typically proportional to adult life span and mammals that live longer for their body size, such as bats and primates, also tend to have a longer developmental time for their body size (de Magalhães et al., 2007). The reproductive system of vertebrates is designed to play this major role of procreation. Most vertebrates regenerate themselves through sexual reproduction apart from a few that multiply asexually by parthenogenesis. Methods involved in sexual reproduction by vertebrates are quite diverse and have contributed greatly to the success of certain species. Male or female reproductive organs normally occur in separate individual vertebrates except in cases of hermaphroditism.
