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- Gonadotropin-releasing hormone (GnRH), produced by the hypothalamus, regulates the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from the anterior pituitary gland.
- The onset of male puberty is stimulated by a rise in gonadotropin-releasing hormone (GnRH) from the hypothalamus, which triggers the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from the anterior pituitary.
- Congenital isolated GnRH, LH, or FSH deficiency can cause secondary hypogonadism, including conditions such as Kallmann’s syndrome, Prader-Willi syndrome, Lawrence-Moon syndrome, GnRH receptor mutations, beta-subunit mutations in LH or FSH, or kisspeptin/G protein-coupled receptor fifty-four mutations.
- Secondary hypogonadism in human males results from a disruption in the hypothalamic-pituitary axis where low gonadotropin-releasing hormone (GnRH), luteinizing hormone (LH), or follicle-stimulating hormone (FSH) leads to low testosterone and impaired spermatogenesis.
- The menstrual cycle is regulated by the hormones GnRH, FSH, LH, estradiol, and progesterone.
- After the onset of puberty, the hypothalamus releases GnRH in a pulsatile fashion every one to two hours to maintain levels of FSH, LH, and plasma testosterone.
- GnRH stimulates the anterior pituitary by binding to and activating a G protein receptor on gonadotrophs, which triggers inositol 1,4,5-triphosphate (IP3) activation and increases intracellular calcium, leading to the release of FSH (follicle-stimulating hormone) and LH (luteinizing hormone).
- Luteinizing hormone (LH) secretion is the result of gonadotropin-releasing hormone (GnRH) pulsatility, which is regulated by hypothalamic clock genes and the pulsatile secretion of Kisspeptin.
- In cases of secondary hypogonadism, Leydig and Sertoli cells remain functional and intact but cannot exert their effects due to a lack of proper stimuli (GnRH, LH, or FSH), resulting in low testosterone levels or loss of spermatogenesis.
- Luteinizing hormone (LH) seasonality appears to be independent of the environment and may be regulated by a central mechanism involving the hypothalamic gonadotropin-releasing hormone (GnRH).
- The hypothalamic-pituitary-gonadal axis, formed by GnRH, FSH, LH, and testicular hormones, promotes and maintains sexual development and function in the male.
- In females, estrogens and progesterone are released from the developing follicles, distinct from the hormones GnRH, FSH, and LH.
- Gonadotropin-releasing hormone (GnRH) travels to the anterior pituitary gland, where it activates G protein–coupled receptors, signaling the pituitary gland to release follicle-stimulating hormone (FSH) and luteinizing hormone (LH).
Facts (13)
Sources
Physiology, Male Reproductive System - StatPearls - NCBI Bookshelf ncbi.nlm.nih.gov 7 facts
claimGonadotropin-releasing hormone (GnRH), produced by the hypothalamus, regulates the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from the anterior pituitary gland.
claimThe onset of male puberty is stimulated by a rise in gonadotropin-releasing hormone (GnRH) from the hypothalamus, which triggers the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from the anterior pituitary.
claimCongenital isolated GnRH, LH, or FSH deficiency can cause secondary hypogonadism, including conditions such as Kallmann’s syndrome, Prader-Willi syndrome, Lawrence-Moon syndrome, GnRH receptor mutations, beta-subunit mutations in LH or FSH, or kisspeptin/G protein-coupled receptor fifty-four mutations.
claimSecondary hypogonadism in human males results from a disruption in the hypothalamic-pituitary axis where low gonadotropin-releasing hormone (GnRH), luteinizing hormone (LH), or follicle-stimulating hormone (FSH) leads to low testosterone and impaired spermatogenesis.
claimAfter the onset of puberty, the hypothalamus releases GnRH in a pulsatile fashion every one to two hours to maintain levels of FSH, LH, and plasma testosterone.
claimGnRH stimulates the anterior pituitary by binding to and activating a G protein receptor on gonadotrophs, which triggers inositol 1,4,5-triphosphate (IP3) activation and increases intracellular calcium, leading to the release of FSH (follicle-stimulating hormone) and LH (luteinizing hormone).
claimIn cases of secondary hypogonadism, Leydig and Sertoli cells remain functional and intact but cannot exert their effects due to a lack of proper stimuli (GnRH, LH, or FSH), resulting in low testosterone levels or loss of spermatogenesis.
Seasonal Changes of Serum Gonadotropins and Testosterone in ... frontiersin.org 2 facts
claimLuteinizing hormone (LH) secretion is the result of gonadotropin-releasing hormone (GnRH) pulsatility, which is regulated by hypothalamic clock genes and the pulsatile secretion of Kisspeptin.
claimLuteinizing hormone (LH) seasonality appears to be independent of the environment and may be regulated by a central mechanism involving the hypothalamic gonadotropin-releasing hormone (GnRH).
Unknown source 1 fact
claimThe menstrual cycle is regulated by the hormones GnRH, FSH, LH, estradiol, and progesterone.
Physiology, Male Reproductive System - PubMed pubmed.ncbi.nlm.nih.gov 1 fact
claimThe hypothalamic-pituitary-gonadal axis, formed by GnRH, FSH, LH, and testicular hormones, promotes and maintains sexual development and function in the male.
Hormonal Control Of Reproduction - MCAT Content - Jack Westin jackwestin.com 1 fact
claimIn females, estrogens and progesterone are released from the developing follicles, distinct from the hormones GnRH, FSH, and LH.
Physiology, Menstrual Cycle - StatPearls - NCBI Bookshelf ncbi.nlm.nih.gov 1 fact
claimGonadotropin-releasing hormone (GnRH) travels to the anterior pituitary gland, where it activates G protein–coupled receptors, signaling the pituitary gland to release follicle-stimulating hormone (FSH) and luteinizing hormone (LH).