gonadotropin
Học thuậtThân thiện
Definition
Noun: A protein hormone secreted by the anterior pituitary gland and, during pregnancy, by the placenta. Its primary function is to stimulate the gonads (the ovaries in females and the testes in males), thereby controlling and regulating reproductive activity, including gamete production and sex steroid hormone secretion.
Usage and Examples
- Scientific/Medical Context: The term is used almost exclusively in biological, endocrinological, and medical contexts.
- The doctor ordered a test to measure the patient's level of gonadotropin.
- Human chorionic gonadotropin (hCG) is a specific type of gonadotropin produced early in pregnancy.
Advanced Usage and Notes
- Types: The two primary gonadotropins in humans are luteinizing hormone (LH) and follicle-stimulating hormone (FSH). A third, human chorionic gonadotropin (hCG), is produced by the placenta.
- Function: Gonadotropins act on the gonads to promote:
- In females: Ovarian follicle growth, ovulation, and progesterone production.
- In males: Spermatogenesis and testosterone production.
- Clinical Use: Synthetic gonadotropins are used in fertility treatments to induce ovulation or stimulate sperm production.
Variants and Related Words
- Gonadotropin (noun): The standard spelling.
- Gonadotrophin (noun): An alternate spelling, equally accepted, with the same meaning.
- Gonadotropic (adjective): Describing something that stimulates or affects the gonads (e.g., a gonadotropic effect).
- Gonadotrophin-releasing hormone (GnRH): The hypothalamic hormone that controls the release of gonadotropins from the pituitary.
Synonyms
- Gonad-stimulating hormone: A descriptive synonym.
- Gonadotrophic hormone: Synonym using the alternate spelling root.
Related Phrases and Compounds
- Human chorionic gonadotropin (hCG): The pregnancy hormone detected by common pregnancy tests.
- Gonadotropin deficiency: A medical condition characterized by insufficient production of these hormones.
- Gonadotropin therapy: Medical treatment using administered gonadotropins.
Noun
- hormone secreted by the anterior pituitary gland and placenta; stimulates the gonads and controls reproductive activity