Another treatment for hypogonadism is human chorionic gonadotropin (hCG). Human chorionic gonadotropin is an autocrine growth factor for the blastocyst. The most commonly used hormone therapy is human chorionic gonadotropin (hCG). A low dose of human chorionic gonadotropin (HCG) may be injected after completed ovarian stimulation. Another human gonadotropin is human chorionic gonadotropin (hCG), produced by the placenta during pregnancy. The tumor is called a "chorionic gonadotropin secreting pineal tumor". Blood tests will show very high levels of human chorionic gonadotropin (hCG). Many home pregnancy tests are immunoassays, which detect the pregnancy marker human chorionic gonadotropin. Antibodies raised against human chorionic gonadotropin are used in over the counter pregnancy tests. Other protein substances may be present, including small amounts of human chorionic gonadotropin (hCG). This family which kisspeptin includes prolactin releasing peptide and gonadotropin releasing inhibiting hormone. Follicle-stimulating hormone (FSH) is a gonadotropin, a glycoprotein polypeptide hormone. In ovulation induction, buserelin is used for pituitary suppression as an adjunct to gonadotropin administration. The effects of sublingual estradiol on gonadotropin levels have also been studied in postmenopausal women. GnRH modulators bind to and inhibit the GnRH receptor, thereby preventing gonadotropin release.