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The most common reason for high serum FSH concentration is in a female who is undergoing or has recently undergone menopause. High levels of FSH indicate that the normal restricting feedback from the gonad is absent, leading to an unrestricted pituitary FSH production. FSH may contribute to postmenopausal osteoporosis and cardiovascular disease ...
Administration of luteinizing hormone (LH) (or human chorionic gonadotropin) and follicle-stimulating hormone (FSH) is very effective in the treatment of male infertility due to hypogonadotropic hypogonadism. [60] Although controversial, [61] off-label clomiphene citrate, an antiestrogen, may also be effective by elevating gonadotropin levels. [60]
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]
Gonadotropin therapy involves the use of human chorionic gonadotropin (hCG) and FSH. In the male, hCG stimulates Leydig cells to produce testosterone so that plasma and testicular levels increase. With the increased levels of testosterone, sexual activity, libido and overall wellbeing should improve. [1]
A tiny fraction of patients may still have measurable sperm levels. [1] About 90% of those with Sertoli cell-only syndrome have elevated FSH levels, usually two to three times the normal amount. [1] Testicular biopsy is the only way to confirm non-obstructive azoospermia and Sertoli cell-only syndrome. [1]
This elevation in FSH is important for the recruitment of a new cohort of ovarian follicles in the subsequent cycle. [15] After menstruation begins, FSH levels decrease due to estrogen's negative feedback and inhibin B produced by the developing follicle. FSH stimulates aromatase activity in granulosa cells, converting androgens to estrogen.
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During reproductive years, typical levels are between 1 and 20 IU/L. Physiologic high LH levels are seen during the LH surge (v.s.) and typically last 48 hours. In males over 18 years of age, reference ranges have been estimated to be 1.8–8.6 IU/L. [28] LH is measured in international units (IU). When quantifying the amount of LH in a sample ...
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