Gonadotrophin hormone : These are hormones which stimulate the gonadal activity. It is of two types :

(1) Follicle stimulating hormone (FSH) : It stimulates gonads to form gametes. It is present in both the sexes. In males it regulates spermatogenesis and in females it also stimulates ovary to produce oestrogens and stimulates the growth and development of the ovarial follicles.

(2) Luteinizing hormone : In males the LH results in thesynthesis and secretion of the androgens from the testis. 
In females LH induces the ovulation.