For both male and female reproduction, it really helps to remember that the first hormone in the chain is gonadotropin-releasing hormone (GnRH), released by the hypothalamus to stimulate the release of pituitary gonadotropins - follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from the anterior pituitary gland. In both males and females these two hormones act to promote gametogenesis and androgen/estrogen secretion.