Treating fertility problems in certain women who have not gone through menopause. Treating certain testicular development problems and stimulating the development of secondary sexual characteristics in certain patients. It is also used to treat boys 4 to 9 years old who have testicles that have not moved into the scrotum. Chorionic gonadotropin is a hormone. Human chorionic gonadotropin (HCG) stimulates cells in the testicles to produce androgens and in the ovaries to produce progesterone. Androgens cause the development of male secondary sexual characteristics (eg, hair growth, deepening voice) and may cause the testicles to drop. HCG acts like luteinizing hormone (LH) by stimulating ovulation (release of an egg) in women.