21. Negative feedback of gonadal hormones inhibits gonadotropin release. 22. Gonadotropin -releasing hormone analogs cause temporary regression of fibroids by decreasing estrogen levels.23. This removes the luteotrophic support provided by the gonadotropin luteinizing hormone ( LH ). 24. The female striped bass is injected with human gonadotropin which stimulates her to lay. 25. The latter approach depended on administration of estrogen, progesterone and human chorionic gonadotropin . 26. For example, goserelin is a superagonist of the gonadotropin -releasing hormone receptor. 27. Uterine angiogenesis is upregulated by human chorionic gonadotropin and progesterone and downregulated by estrogen. 28. The hormone is called human chorionic gonadotropin . 29. Gonadotropin deficiency will often cause amenorrhea, oligomenorrhea, hot flashes, or decreased libido.30. Many home pregnancy tests are immunoassays, which detect the pregnancy marker human chorionic gonadotropin .