Properties: Norifam Injection is a combination of two hormones Norethisterone and Estradiol Valerate. It is depot preparation. The contraceptive effect is based on an interaction of central and peripheral mechanism, primarily on ovulation inhibition and alteration of the cervical mucus. Norifam also causes morphological and enzymatic changes in the endometrium which have the effect of rendering nidation difficult. The contraceptive effect of Norifam is similar to that achieved by daily ingestion of combine oral contraceptives pills.