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Gonadotropins spermatogenesis

Stimulation of spermatogenesis in gonadotropin (FSH, LH) deficiency can be achieved by injection of HMG and HCG. HMG or human menopausal gonadotropin is obtained from the urine of postmenopausal women and is rich in FSH activity. HCG, human chorionic gonadotropin, from the urine of pregnant women, acts like LH. [Pg.252]

Follicle-stimulating hormone (FSH) and luteinizing hormone (LH) are the two gonadotropins made in the anterior pituitary lobe. FSH stimulates gameto-genesis and follicular development in women and it stimulates spermatogenesis in men. FSH promotes... [Pg.388]

Gonadotropins are used to induce spermatogenesis in hypogonadotropic hypogonadal men a lengthy treatment is required to obtain mature sperm. For several weeks hCG is injected to increase testosterone levels, followed by injections of menotropins for several months. Prepubertal cryptorchidism can be treated by injections of hCG for up to several months. [Pg.680]

Gonadotropin regnlation Spermatogenesis Sexnal dysfnnction Sexnal restoration and development Protein anabolic effects Increased bone density Increased mnscle mass Increased red blood cell mass... [Pg.728]

Mechanism of Action An androgen that suppresses gonadotropin-releasing hormone, LH, and FSH. TherapeuticEffect Stimulates spermatogenesis, development of male secondary sex characteristics, and sexual maturation at puberty. Stimulates production of red blood cells (RBCs). [Pg.515]

It has a potent antiandrogen and mild progestional activity. It can also inhibit gonadotropin secretion in larger dose and also suppresses spermatogenesis and Leydig cell function. It is used in precocious puberty in males, acne, carcinoma prostate and hirsutism and virilization in women. [Pg.291]

Induction of ovulation, stimulation of spermatogenesis in men HCG family PTomo sapiens] GI 15277242 PID gl5277242 Crystal structure of human chorionic gonadotropin PDB ID IHRP... [Pg.574]

These preparations are used in states of infertility to stimulate ovarian follicle development in women and spermatogenesis in men. In both sexes, they must be used in conjunction with a luteinizing hormone, ie, human chorionic gonadotropin (hCG), to permit ovulation and implantation in women and testosterone production and full masculinization in men. [Pg.869]

In men with gonadotropin deficiencies, pretreatment with chorionic gonadotropin produces external sexual maturation addition of a subsequent course of hMG (or rFSH plus hCG) will stimulate spermatogenesis and lead to fertility. [Pg.869]

Leuprolide, a gonadotropin-releasing hormone agonist, reestablishes spermatogenesis after 2,5-hexanedione-indu-ced irreversible testicular injury in the rat, resulting in normalized stem cell factor expression. Endocrinology 139 236 44... [Pg.146]

Gonadotropin-releasing hormone analogs stimulate and testosterone inhibits the recovery of spermatogenesis in... [Pg.146]

Figure 50-9 The regulatory feedback loop of the hypothalamic-pituitary-gonadal axis. Neural and sensory input from the brain elicits the release of Gn-RH. Gn-RH in turn stimulates the synthesis and release of the gonadotropins FSH and LH, which act on the gonads (ovary and testes) to elicit the ripening and ovulation of the ovary and steroidogenesis (estradiol and progesterone) in the female and spermatogenesis and testosterone production in the male. Inhibin formed by the ovaries and testes along with estradiol and testosterone negatively feeds back to the hypothalamic-pituitary axis to modulate Gn-RH, FSH, and LH release. Figure 50-9 The regulatory feedback loop of the hypothalamic-pituitary-gonadal axis. Neural and sensory input from the brain elicits the release of Gn-RH. Gn-RH in turn stimulates the synthesis and release of the gonadotropins FSH and LH, which act on the gonads (ovary and testes) to elicit the ripening and ovulation of the ovary and steroidogenesis (estradiol and progesterone) in the female and spermatogenesis and testosterone production in the male. Inhibin formed by the ovaries and testes along with estradiol and testosterone negatively feeds back to the hypothalamic-pituitary axis to modulate Gn-RH, FSH, and LH release.
See other pages where Gonadotropins spermatogenesis is mentioned: [Pg.389]    [Pg.511]    [Pg.252]    [Pg.246]    [Pg.132]    [Pg.680]    [Pg.731]    [Pg.343]    [Pg.347]    [Pg.230]    [Pg.230]    [Pg.836]    [Pg.918]    [Pg.515]    [Pg.490]    [Pg.1745]    [Pg.787]    [Pg.200]    [Pg.212]    [Pg.435]    [Pg.436]    [Pg.968]    [Pg.193]    [Pg.298]    [Pg.174]    [Pg.261]    [Pg.155]    [Pg.346]    [Pg.818]    [Pg.2]    [Pg.389]    [Pg.1481]    [Pg.1536]    [Pg.177]    [Pg.774]    [Pg.138]    [Pg.173]    [Pg.173]   
See also in sourсe #XX -- [ Pg.751 ]



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