PURPOSE Treatment with cyclophosphamide (CYC) confers up to a 40% risk of ovarian failure in women of reproductive age. The use of GnRH agonists (GnRHa) to preserve ovarian function has been investigated in several small studies. We performed a systematic review of studies examining whether a GnRHa administered during chemotherapy is protective of ovarian function and fertility. METHODS We se...

It is now known that gonadotrophin-releasing hormone analogues (GnRHa) are extremely efficient at reducing uterine fibroid volume and reversing the related symptomatology. However, the fibroids tend to return to their pretreatment size about 6 months after discontinuing treatment. GnRHa treatment cannot be continued indefinitely due to its potential complications and high cost. It is therefore ...

The efficacy of GnRH agonists (GnRHa) as a method for protecting fertility has been controversially discussed for years. This is clearly demonstrated by the fact that there are now more meta-analyses on this subject than individual studies. However, the discussion is often not conducted objectively but seems to be shaped by fundamental ideologies, leading to a scientific dispute between GnRHa a...

Purpose The potential effect of gonadotropin-releasing hormone agonist (GnRHa) treatment on the weight of girls with central precocious puberty (CPP) remains a controversy. We investigated anthropometric changes during and after GnRHa treatment among girls with CPP. Methods This retrospective study evaluated data from 127 girls with CPP who received GnRHa treatment for ≥2 years. Height, weigh...

Objective: To assess the effect of GnRHa as luteal phase support in women undergoing controlled ovarian stimulation and IUI. Design: A prospective, randomized trial. Setting: Cytogenetic and Endoscopy Unit, Zagazig University Hospital. Methods: Two hundred fourteen women either with unexplained or mild male factor infertility was planned to contribute to this study. After exclusion 18 women, 19...

OBJECTIVE The aim of the study reported here was to investigate the protective effect of gonadotropin-releasing hormone analog (GnRHa) against cyclophosphamide (CTX)-induced gonadotoxicity. METHODS Eighty Fischer 344 rats were divided randomly into four groups (20 per group). One group received normal saline, one GnRHa, one CTX, and one GnRHa+CTX. Several parameters were used to observe the o...

Gonadotropin-releasing hormone analog (GnRHa) is used for medical management of endometriosis and premature luteinizing hormone surge during controlled ovarian stimulation. Human endometrium expresses GnRH receptors, and GnRHa alters the expression of transforming growth factor-beta (TGF-beta) and receptors in endometrial cells. Because the diverse biological actions of GnRHa and TGF-beta are m...

Luo, Xiaoping, Li Ding, and Nasser Chegini. Gonadotropinreleasing hormone and TGFactivate MAP kinase and differentially regulate fibronectin expression in endometrial epithelial and stromal cells. Am J Physiol Endocrinol Metab 287: E991–E1001, 2004. First published July 20, 2004; doi:10.1152/ajpendo.00200.2004.—Gonadotropin-releasing hormone analog (GnRHa) is used for medical management of endo...

This study was aimed to evaluate the efficacy of a single administration of long-acting gonadotrophin-releasing hormone agonist (GnRHa) as compared with daily administrations of short-acting GnRHa in controlled ovarian hyperstimulation (COH) for in vitro fertilization and embryo transfer (IVF-ET) cycles. The mean dosage of recombinant follicle-stimulating hormone (rFSH) required for COH (2,354....

Gonadotrophin-releasing hormone agonists (GnRHa) are widely used in in-vitro fertilization (IVF) for the prevention of a premature rise in luteinizing hormone (LH) concentrations. However, the administration of GnRHa during the follicular phase may also impair subsequent luteal function due to retarded recovery of pituitary gonadotrophin secretion. Therefore, luteal supplementation is generally...