The author has attempted to prepare the text on modern lines of teaching for the undergraduate students in objective pattern. The figures will help the readers understand the intricate mechanism of hormonal activities in the body. The tables will help them memorize the facts. The postgraduate students also can derive benefits from it. The book can be well-supportive for the teachers too in preparation of their lectures according to the time schedule. The book covers syllabi of MCI, VCI and UGC.