You are here: Urology Textbook > Urologic examinations > Blood tests > LH
Luteinizing Hormone (FSH)
Luteinizing hormone (LH) is a peptide hormone of the adenohypophysis. LH is a gonadotropin and stimulates testosterone production of the leydig cells in the testis. The release of LH is stimulated by GnRH from the hypothalamus. Testosterone inhibits the release of LH (negative feedback).
Standard Value for men:
Depending on laboratory 1–10 U/l.
Laboratory test method:
Screening test (together with testosterone) for gonadal endocrine disorders (hypogonadism or hypergonadism). For abnormal testosterone levels, a low LH concentration suggests a hypogonadotrophic dysfunction, an elevated LH concentration a hypergonadotrophic dysfunction. Please see also section hypogonadism and hypergonadism for further differential diagnosis.
|FSH in serum||Index||Prolactin in serum|
Index: 1–9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
ReferencesKöhn, F.-M. (2004). [diagnosis and therapy of hypogonadism in adult males].
Urologe A, 43(12):1563-81; quiz 1582–3.
Trottmann, M., Dickmann, M., Stief, C. G., and Becker, A. J. (2010).
[laboratory workup of testosterone].
Urologe A, 49(1):11-15.
Vermeulen, A.; Verdonck, L. & Kaufman, J. M.
A critical evaluation of simple methods for the estimation of free
testosterone in serum.
The Journal of clinical endocrinology and metabolism, 1999, 84, 3666-3672
Deutsche Version: LH Labor Test