The study scrutinizes the Human Gonadal Steriodogenesis. In achieving this aim, the following specific objectives were laid out to determine the effect of Gonadal Steriodogenesis on human body, quantify some testicular parameters involved in evaluation of semen quality as a predictive measure of female reproductive efficiency (fertility), and proffer solution to the above stated problems of the Human Gonadal Steriodogenesis. Steroidogenesis is the synthesis of biologically active steroids that plays a crucial role during various physiological processes involved in gonadal development, growth and maturation. Male and Female Sex steroids that are required during all stages of the reproductive cycle in teleost which include sex differentiation, maturation, growth, and sexual behaviour. Data used in this work is derived primary from secondary sources. The methodology therefore, is basically documentary in nature. This involves learning new facts and principles through the study of documents and records. The documents and records include journals, textbooks, newspapers, magazines, official publications etc. By putting together logically evidence derived from documents and records. Conclusion which either established facts hitherto unknown or sound generalization can be obtained. This study will be of immense benefit to medical professionals and other researchers who intend to know more on this study and can also be used by non-researchers to build more on their research work. This study contributes to knowledge and could serve as a guide for other study.