Certain hormones , such as follicle stimulating hormone (FSH) and luteinsing hormone (LH) affect the reproductive organs of both males and females . Other hormones, known as _, have significantly higher concentrations in one gender rather than the other. _ and _ are the most critical of these, playing a key role in the development of reproductive systems and gender-specific traits. High concentrations of these hormones in the opposite gender offten result in significant complications. _ stimulates cells to produce testosterone in males, while in females, this hormone signals an increase in ovulation hormones to prepare for pregnancy. _ stimulates the production of sperm in males, but signals growth of the ovum in females. FSH, LH, Androgen's, Estrogen, Prolactin, testosterone