OBJECTIVE To investigate the effect of cabergoline (Dostinex, a dopamine agonist) on the myoma growth compared to Diphereline (a gonadotropin-releasing hormone agonist). METHODS This study took place in the Department of Obstetrics and Gynecology of Tabriz University of Medical Sciences, Tabriz, Iran from July 2004 to December 2005. Fifty women with uterine myoma, who met the criteria of the ...

OBJECTIVE To elucidate the physiologic mechanism responsible for the supraphysiologic gonadotropin release from the pituitary induced by gonadotropin-releasing hormone (GnRH) agonist in female rats primed with GnRH antagonist. DESIGN Controlled experimental intervention. SETTING Government research facility. ANIMAL(S) Forty 8-week-old Sprague-Dawley rats. INTERVENTION(S) Forty oophorect...

Until 2000 it was believed that gonadotropin-releasing hormone (GnRH) was the sole regulator of hypophyseal gonadotropes. In 2000, the discovery of a gonadotropin inhibitory hormone (GnIH) initiated a revolution in the field of reproductive physiology. Identification of GnIH homologues in mammals, the arginine-phenylalanine- amide (RFamide)-related peptides (RFRPs), indicated a similar function...

Background: Whether gonadotropin-releasing hormone agonist (GnRH-a) pituitary suppression improves clinical outcomes in non-endometriosis patients undergoing frozen embryo transfer remains controversial. The objective of this study is to investigate whether GnRHa combined with replacement treatment (HRT) compared HRT alone can improve the frozen-thawed without endometriosis. Methods: This a ret...

The decapeptide gonadotropin-releasing hormone, also referred to as luteinizing hormone-releasing hormone with the sequence (pGlu-His-Trp-Ser-Tyr-Gly-Leu-Arg-Pro-Gly-NH₂) plays an important role in regulating the reproductive system. It stimulates differential release of the gonadotropins FSH and LH from pituitary tissue. To date, treatment of hormone-dependent diseases targeting the GnRH recep...

This study explored the effects of GnRH agonist (GnRHa) immunity on expression of FSHR mRNA in pituitary and FSHR protein in uteri, and also confirmed its efficacy on uterine development. 42 prepuberty and non cyclic ewes were assigned to 6 experimental groups (EG) during anestrus season. Animals in EG-I, EG-II and EG-III were subcutaneously injected with 200, 300 and 400 μg alarelin antigens (...