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Luteinizing hormone (LH, also known as luteinising hormone, [1] lutropin and sometimes lutrophin [2]) is a hormone produced by gonadotropic cells in the anterior pituitary gland. The production of LH is regulated by gonadotropin-releasing hormone (GnRH) from the hypothalamus. [ 3 ]
Hypergonadotropic hypogonadism (HH), also known as primary or peripheral/gonadal hypogonadism or primary gonadal failure, is a condition which is characterized by hypogonadism which is due to an impaired response of the gonads to the gonadotropins, follicle-stimulating hormone (FSH) and luteinizing hormone (LH), and in turn a lack of sex steroid production. [1]
In men: Used to treat select cases of Hypogonadotropic Hypogonadism in adult males. [25] In off-label use, some urologists prescribe hCG in low doses in combination with testosterone replacement to preserve fertility. [26] In male children: Also used to treat prepubertal cryptorchidism not due to anatomical obstruction.
During the initial phase of luteinizing hormone-releasing hormone (LHRH) agonist therapy in individuals assigned male at birth, there is a notable phenomenon known as the "flare." This occurs when testosterone levels temporarily surge by approximately 50% within the first 1 to 2 weeks of therapy.
Histrelin is also available in a 12-month subcutaneous implant (Vantas) for the palliative treatment of advanced prostate cancer, since 2005 in the US, and since January 2010 in the UK. A 12-month subcutaneous implant (Supprelin LA) for central precocious puberty (CPP) was approved in May 2007, by the US Food and Drug Administration .
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The standard range given is based on widely varying ages and, given that testosterone levels naturally decrease as humans age, age-group specific averages should be taken into consideration when discussing treatment between doctor and patient. [14] In men, testosterone falls approximately 1 to 3 percent each year. [15] Blood testing
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