How is the reproductive system affected by the endocrine system?

The influence of the endocrine system on behavior has been studied on many levels. Much of the work has been done on animals. There is, however, a growing body of information on hormonal effects on a variety of human behaviors, including reproductive and developmental behavior, reaction to stress, learning, and memory. Studies carried out in reproductive and developmental biology on both animal and human subjects have substantiated the belief that hormones influence mating behavior, developmental events including sexual differentiation, and female and male sexuality. Castration experiments have linked the testes with a male mating behavior pattern in animals. The sexually active adult male aggressively seeks and attempts to mount the female whether she is receptive or not. The castrated male retains the ability to mount a female but loses the aggressiveness and persistence of the normal male’s pursuit. The castrated animal may assume more submissive female behavior and even engage in homosexual encounters.

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