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GnRH agonist
The abbreviation for gonadotropin-releasing hormone agonist. It is a drug analogue of this hormone which,  after an initial phase of pituitary stimulation, desensitises the receptors for gonadotropin-releasing hormone (GnRH) and reduces the secretion of LH (luteinising hormone) and FSH (follicle-stimulating hormone). In assisted reproduction, it is used to control pituitary function and prevent premature ovulation during controlled ovarian stimulation. It is also known as GnRHa.
Grammatical category Noun
Field Anatomy, physiology and embryology
Level of specialization High
Definition source Instituto Nacional del Cáncer
Gender relationship No
Variants
Abbreviation
Formal
Synonym
Formal
Equivalents

Spanish

agonista de la GnRH

Valenciano

agonista de la GnRH
agonista de l’hormona alliberadora de gonadotropina
Associated concepts
May cause
functional ovarian cysts at the start of treatment
hot flushes
headache
hypo-oestrogenic symptoms
mood swings
vaginal dryness
Causes
initial pituitary stimulation
a reduction in LH and FSH secretion
Type of
GnRH analogue
Examples
As for the trigger, gonadotropin-releasing hormone agonist GnRH agonist 0.2mg/2ml and human chorionic gonadotropin (HCG )1500 IU were used.
Different drugs for the induction of ovulation can be used instead of hCG, including GnRH agonist. 
Collocations
WITH ADJECTIVES
single-dose | long-acting || synthetic || bolus GnRH agonist
WITH NOUNS
GnRH agonist protocol | treatment || trigger
WITH VERBS
use | administer GnRH agonist