Chorionic is a preparation of human chorionic gonadotrophin obtained from the urine of pregnant women. The drug stimulates steroid production by the gonads by virtue of a biological effect similar to that of luteinizing hormone. Chorionic works in the same way as pituitary LH. Chorionic stimulates the production of gonadal steroid hormones. These hormones are androgens that are produced by the interstitial cells of the testis and progesterone produced by the corpus luteum of the ovary.