ABSTRACT
Progesterone and estradiol are responsible for playing a vital role in contraception. The fertilization is prevented mainly either by inhibiting ovulation or by making the mucus of the female genital tract thick and viscid in the present study, the extracted material of "Cyprea moneta shell" has been found to contain a reasonable amount of sex steroids with small amount of gonadotrophins, The concentration of LH and FSH were 0.564 mIU/ml and 0.644 mIU/ml, respectively, as compared to the undetectable amount of gonadotrophin in medicinal plants [Abrus precatorius, Ricinus communis Crotalaria juncea, Acacia arabica and Ficus religiosa]. However, the sex steroid hormones detected in all these medicinal plants were in large amount, causing contraception