Sexual differentiation in humans development can only occur when the fetal testis secretes key hormones at a critical period in early gestation. The testes begin to secrete three hormones that influence the male internal and external genitalia: they secrete anti-müllerian hormone (AMH), testosterone, and dihydrotestosterone (DHT). Anti-müllerian hormone causes the paramesonephric ducts to regress. Testosterone converts the mesonephric ducts into male accessory structures, including the epididymis, vas deferens, and seminal vesicle. Testosterone will also control the descending of the testes from the abdomen into the scrotum. Many other genes found on other autosomes, including"WT-1", "SOX9", "SF-1" also play a role in gonadal development. Females:
Sexual desire and intimate relationships primary goal of sexual desire. It has also been suggested that women are more likely than men to develop a “relational” or “person-centered” orientation to sexual desire, whereas men are more likely to adopt a “recreational” or “body-centered” orientation to sexuality. These results further support the suggestion that despite generally consistent definitions of sexual desire, perceived differing end goals of sexual desire may exist between the sexes. In keeping with providing definitions of sexual desire consistent with those of theorists, both men and women have consistently expressed their beliefs that the causes of male sexual desire differ from female causes