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Follitropin subunit beta also known as follicle-stimulating hormone beta subunit (FSH-B) is a protein that in humans is encoded by the FSHB gene. [ 5 ] [ 6 ] [ 7 ] Alternative splicing results in two transcript variants encoding the same protein.
Follicle-stimulating hormone (FSH) is a gonadotropin, a glycoprotein polypeptide hormone. [1] FSH is synthesized and secreted by the gonadotropic cells of the anterior pituitary gland [ 2 ] and regulates the development, growth, pubertal maturation , and reproductive processes of the body.
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]
High follicle-stimulating hormone levels and low estradiol might indicate menopause, but of course, if you’re younger than typical menopause age, you should also rule out pregnancy with a ...
LH is released from the pituitary gland along with FSH in response to GnRH release into the hypophyseal portal system. [4] Pulsatile GnRH release causes pulsatile LH and FSH release to occur, which modulates and maintains appropriate levels of bioavailable gonadal hormone—testosterone in males and estradiol in females—subject to the requirements of a superior feedback loop. [3]
The follicle stimulating hormone (FSH) then stimulates the follicle-stimulating hormone receptor (FSHR) of the sertoli cells, therefore producing inhibin B which brings into play a negative feedback over the pituitary FSHB expression. The IGSF1 gene inhibits the activin A pathway which decreases the rate of FSHB expression.