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GNRH Agonist

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https://www.readbyqxmd.com/read/28625761/impact-of-vitamin-d-levels-on-ovarian-reserve-and-ovarian-response-to-ovarian-stimulation-in-oocyte-donors
#1
Alberta Maria Fabris, Maria Cruz, Carlos Iglesias, Alberto Pacheco, Azadeh Patel, Jayesh Patel, Human Fatemi, Juan Antonio García-Velasco
Recently, growing interest in vitamin D has emerged from findings that demonstrate a low vitamin D status in populations. Similarly, much interest has been shown in the role that anti-Müllerian hormone (AMH) plays in reproductive physiology. Considerable confusion as to whether vitamin D status is related to ovarian function can be found in the literature. Our retrospective study was performed from June 2014 to April 2015. Oocyte donors were recruited and stimulated under the antagonist protocol with gonadotrophin-releasing hormone (GnRH) agonist to trigger ovulation...
May 19, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28620352/efficacy-of-follicle-stimulating-hormone-fsh-alone-fsh%C3%A2-%C3%A2-luteinizing-hormone-human-menopausal-gonadotropin-or-fsh%C3%A2-%C3%A2-human-chorionic-gonadotropin-on-assisted-reproductive-technology-outcomes-in-the-personalized-medicine-era-a-meta-analysis
#2
Daniele Santi, Livio Casarini, Carlo Alviggi, Manuela Simoni
SETTING: Luteinizing hormone (LH) and human chorionic gonadotropin (hCG) act on the same receptor, activating different signal transduction pathways. The role of LH or hCG addition to follicle-stimulating hormone (FSH) as well as menopausal gonadotropins (human menopausal gonadotropin; hMG) in controlled ovarian stimulation (COS) is debated. OBJECTIVE: To compare FSH + LH, or FSH + hCG or hMG vs. FSH alone on COS outcomes. DESIGN: A meta-analysis according to PRISMA statement and Cochrane Collaboration was performed, including prospective, controlled clinical trials published until July 2016, enrolling women treated with FSH alone or combined with other gonadotropins...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28613432/medical-therapy-for-preventing-recurrent-endometriosis-after-conservative-surgery-a-cost-effectiveness-analysis
#3
Bin Wu, Zhiyou Yang, Ruoyan Gai Tobe, Yu Wang
OBJECTIVE: To assess the cost-effectiveness of different strategies, including the gonadotropin-releasing hormone agonist (GnRH-a) and oral contraceptive therapy, for the prevention of endometriosis recurrence after conservative surgery. DESIGN: Cost-effectiveness analysis from a health care perspective. SETTING: Chinese setting represented as a health resource limited setting. POPULATION: patients who undergo laparoscopic or laparotomic conservative surgery for endometriosis...
June 14, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28611542/protecting-effects-of-gonadotropin-releasing-hormone-agonist-on-chemotherapy-induced-ovarian-damage-in-premenopausal-breast-cancer-patients-a-systematic-review-and-meta-analysis
#4
REVIEW
Fang Bai, Yunshu Lu, Kejin Wu, Qing Chen, Longlong Ding, Meixin Ge, Ziyi Weng
OBJECTIVE: There is no universal consensus on whether gonadotropin-releasing hormone (GnRH) agonist could protect chemotherapy-induced ovarian damage in premenopausal breast cancer patients. This meta-analysis was conducted to estimate the protective effects of GnRH agonist on premenopausal breast cancer patients in details. METHODS: PubMed, Cochrane Library, Embase, CNKI and the Chinese Wangfang Database, conference proceedings and clinical trials were searched to find studies reported since 2000...
March 2017: Breast Care
https://www.readbyqxmd.com/read/28602789/age-associated-and-deslorelin-induced-declines-in-serum-anti-m%C3%A3-llerian-hormone-concentrations-in-female-cheetahs-acinonyx-jubatus
#5
Ned J Place, Adrienne E Crosier, Pierre Comizzoli, Jennifer B Nagashima, Holly Haefele, Anne Schmidt-Küntzel, Laurie L Marker
Anti-Müllerian hormone (AMH) is widely used in human medicine to non-invasively estimate the size of the ovarian follicle reserve and to predict the ovarian response to gonadotropin stimulation in the context of assisted reproductive technologies (e.g., IVF). These applications of AMH testing have recently expanded to non-human mammals, with production animals, such as cows, goats and sheep being the primary focus of AMH research. However, few investigations have involved exotic species, and in particular carnivores...
June 8, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28601880/accelerated-coasting-does-not-affect-oocyte-maturation
#6
Ahmed F Galal, Hadeer Aly Abbassy, Ashraf Hany AbdElrahman, Mohamed Sayed Abdelhafez, Ahmed Badawy
AIMS: The study aimed to assess the efficacy of accelerating the process of coasting through adding gonadotropin releasing hormone (GnRH) antagonist (GnRH-ant) on the day of triggering of oocyte maturation without withholding the GnRH agonist (GnRHa) in women at risk for developing ovarian hyperstimulation syndrome (OHSS). METHODS: Retrospective case-control study of the outcomes of GnRHa cycles in which women were at risk to develop OHSS. Women who underwent acceleration of coasting (n = 50) were compared with a control group of women who underwent usual coasting (n = 57)...
June 10, 2017: Gynecologic and Obstetric Investigation
https://www.readbyqxmd.com/read/28601378/gnrh-agonist-administration-prior-to-embryo-transfer-in-freeze-all-cycles-of-patients-with-endometriosis-or-aberrant-endometrial-integrin-expression
#7
Eric S Surrey, Mandy Katz-Jaffe, Laxmi V Kondapalli, Robert L Gustofson, William B Schoolcraft
Prolonged gonadotrophin-releasing hormone agonist (GnRHa) administration before IVF with fresh embryo transfer to patients with endometriosis or aberrant endometrial integrin expression (-integrin) improves outcomes but may suppress ovarian response and prevents elective cryopreservation of all embryos. This retrospective cohort pilot study evaluates freeze-all cycles with subsequent prolonged GnRHa before embryo transfer in these populations. Patients from 2010 to 2015 who met inclusion criteria and received a long-acting GnRHa every 28 days twice before FET were evaluated...
May 17, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28600619/ovarian-hyperstimulation-syndrome-following-gnrh-agonist-trigger-think-ectopic
#8
Raoul Orvieto, Valeria Stella Vanni
PURPOSE: This study aims to report a case of ovarian hyperstimulation syndrome (OHSS) following GnRH agonist trigger for final follicular maturation. METHODS: This study is a retrospective chart review. RESULTS: We report the first case of OHSS following GnRH agonist trigger for final follicular maturation and freeze-all, masking extrauterine pregnancy (EUP). The present case report elucidates the feasibility of stimulating and recruiting ovarian follicles yielding mature oocytes during early pregnancy and the ability of GnRH agonist to trigger final follicular maturation during pregnancy, in the presence of high progesterone and hCG levels...
June 9, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28599837/measurement-of-testosterone-and-cortisol-metabolites-and-luteinising-hormone-in-captive-southern-hairy-nosed-wombat-lasiorhinus-latifrons-urine
#9
Z Du, T Keeley, T Janssen, V Nicolson, S D Johnston
This study reports the validation and use of enzyme immunoassays (EIA) to measure changes in plasma and urinary luteinizing hormone, testosterone metabolites (UTM) and cortisol metabolites (UCM) in captive southern hairy-nosed wombats (Lasiorhinus latifrons). GnRH agonist and ACTH agonist challenges were conducted to validate urinary testosterone (male wombat only) and cortisol (male and female wombats) EIAs. Following intra-muscular injection of 8-12μg buserelin (n=4 males), there was a significant increase in both plasma (P<0...
June 17, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28591479/hypothalamic-hamartoma-with-epilepsy-review-of-endocrine-comorbidity
#10
Victor S Harrison, Oliver Oatman, John F Kerrigan
The most common, and usually the only, endocrine disturbance in patients with hypothalamic hamartoma (HH) and epilepsy is central precocious puberty (CPP). The mechanism for CPP associated with HH may relate to ectopic generation and pulsatile release of gonadotropin-releasing hormone (GnRH) from the HH, but this remains an unproven hypothesis. Possible regulators of GnRH release that are intrinsic to HH tissue include the following: (1) glial factors (such as transforming growth factor α[TGFα) and (2) γ-aminobutyric acid (GABA)-mediated excitation...
June 2017: Epilepsia
https://www.readbyqxmd.com/read/28590310/medical-management-of-endometriosis
#11
Saima Rafique, Alan H Decherney
Endometriosis is a chronic medical condition that affects around 6% to 10% of reproductive age women. Pelvic pain, dysmenorrhea, and infertility are the most common presenting symptoms. The disease is characterized by estrogen-dependent growth of the endometrial glands and stroma outside the endometrial cavity. The diagnosis requires a high degree of suspicion and can be only confirmed on histopathology. Treatment includes medical and surgical options. Both hormonal and nonhormonal medical options are available and are tried at first with a goal to control pain and stop the growth of the endometriotic lesions...
June 5, 2017: Clinical Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28587385/gnrh-antagonist-for-patients-with-polycystic-ovary-syndrome-undergoing-controlled-ovarian-hyperstimulation-for-in-vitro-fertilization-and-embryo-transfer-in-fresh-cycles
#12
Xiang-Hong Zhai, Ping Zhang, Feng-Xia Wu, An-Cong Wang, Pei-Shu Liu
The aim of the present study was to evaluate the influence of a gonadotropin-releasing hormone (GnRH) antagonist compared with a GnRH agonist on the in vitro fertilization cycle outcome in patients with polycystic ovary syndrome. The outcomes of pregnancy were evaluated. The area under the curve (AUC) of the receiver operating characteristic (ROC) curve was also used to evaluate whether the endometrial thickness (cm) and estradiol (E2) level (pg/ml) on the day of human chorionic gonadotropin (hCG) administration (the hCG day) had the best sensitivity and specificity for predicting a clinical pregnancy...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28578436/gonadotropin-releasing-hormone-agonist-triggering-with-concomitant-administration-of-low-doses-of-human-chorionic-gonadotropin-or-a-freeze-all-strategy-in-high-responders
#13
Meric Karacan, Erkan Erdem, Akin Usta, Ayse Arvas, Ziya Cebi, Teksen Camlibel
To compare the live birth rates and moderate/severe ovarian hyperstimulation syndrome (OHSS) rates of 2 different approaches using gonadotropin-releasing hormone (GnRH) agonist triggering in high responder women. Methods: A retrospective cohort study was performed to evaluate intracytoplasmic sperm injection (ICSI) and embryo transfer (ET) outcomes in high responder women who underwent ovulation induction with a GnRH antagonist protocol between April 2011 and March 2015. In group 1 (n=74), GnRH agonist was used for ovulation triggering with the concomitant use of 1500 IU of urinary human chorionic gonadotropin (hCG) immediately after oocyte retrieval followed by fresh ET and standard luteal support...
June 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/28558117/gonadotropin-releasing-hormone-agonist-triggering-and-a-freeze-all-approach-the-final-step-in-eliminating-ovarian-hyperstimulation-syndrome
#14
Marcus J Davenport, Beverley Vollenhoven, Alon J Talmor
Importance: In vitro fertilization (IVF) has evolved dramatically in recent decades; however, clinical practices have been slow to adopt these advancements, particularly regarding final oocyte maturation and the timing of embryo transfer. Concerns still exist over the ability of gonadotropin-releasing hormone (GnRH) agonists and elective embryo cryopreservation to reduce the risk of ovarian hyperstimulation syndrome (OHSS) without compromising pregnancy outcomes. Objective: This review investigates IVF outcomes associated with GnRH-agonist triggering and elective embryo cryopreservation...
May 2017: Obstetrical & Gynecological Survey
https://www.readbyqxmd.com/read/28552886/administration-of-gonadotropin-releasing-hormone-agonist-on-day-5-increases-luteal-blood-flow-and-improves-pregnancy-prediction-accuracy-on-day-14-in-recipient-holstein-cows
#15
Tomomi Kanazawa, Motohide Seki, Keiki Ishiyama, Masao Araseki, Yoshiaki Izaike, Toru Takahashi
This study assessed the effects of gonadotropin-releasing hormone (GnRH) treatment on Day 5 (Day 0 = estrus) on luteal blood flow and accuracy of pregnancy prediction in recipient cows. On Day 5, 120 lactating Holstein cows were randomly assigned to a control group (n = 63) or GnRH group treated with 100 μg of GnRH agonist (n = 57). On Days 3, 5, 7, and 14, each cow underwent ultrasound examination to measure the blood flow area (BFA) and time-averaged maximum velocity (TAMV) at the spiral arteries at the base of the corpus luteum using color Doppler ultrasonography...
May 28, 2017: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/28550793/acute-gonadotropin-releasing-hormone-agonist-treatment-enhances-extinction-memory-in-male-rats
#16
L Y Maeng, M B Taha, K K Cover, S S Glynn, M Murillo, K Lebron-Milad, M R Milad
Leuprolide acetate (LEU), also known as Lupron, is commonly used to treat prostate cancer in men. As a gonadotropin-releasing hormone (GnRH) receptor agonist, it initially stimulates the release of gonadal hormones, testosterone (T) and estradiol. This surge eventually suppresses these hormones, preventing the further growth and spread of cancer cells. Individuals receiving this treatment often report anxiety and cognitive changes, but LEU's effects on the neural mechanisms that are involved in anxiety during the trajectory of treatment are not well known...
May 17, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28540977/oral-contraceptive-pill-progestogen-or-oestrogen-pretreatment-for-ovarian-stimulation-protocols-for-women-undergoing-assisted-reproductive-techniques
#17
REVIEW
Cindy Farquhar, Luk Rombauts, Jan Am Kremer, Anne Lethaby, Reuben Olugbenga Ayeleke
BACKGROUND: Among subfertile women undergoing assisted reproductive technology (ART), hormone pills given before ovarian stimulation may improve outcomes. OBJECTIVES: To determine whether pretreatment with the combined oral contraceptive pill (COCP) or with a progestogen or oestrogen alone in ovarian stimulation protocols affects outcomes in subfertile couples undergoing ART. SEARCH METHODS: We searched the following databases from inception to January 2017: Cochrane Gynaecology and Fertility Group Specialised Register, The Cochrane Central Register Studies Online, MEDLINE, Embase, CINAHL and PsycINFO...
May 25, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28539995/the-effect-of-luteinizing-hormone-reducing-agent-on-anxiety-and-novel-object-recognition-memory-in-gonadectomized-rats
#18
Paria Arfa-Fatollahkhani, Arezo Nahavandi, Hossein Abtahi, Shabnam Anjidani, Sahar Borhani, Seyed Behnam Jameie, Mohammad Shabani, Saeed Mehrzadi, Ali Shahbazi
INTRODUCTION: Mood disorders such as anxiety and depression are common following menopause and andropause. Lack of sex steroid hormones is suggested as the primary cause of these disturbances. The level of luteinizing hormone (LH) would also rise 3-4 times than normal in these people. The potential effects of LH on mood and cognitive symptoms following menopause and andropause are still unknown. This study aimed to investigate the effect of increased LH on novel object discrimination (NOD) memory and anxiety like behavior in gonadectomized rats...
March 2017: Basic and Clinical Neuroscience
https://www.readbyqxmd.com/read/28513550/hcg-triggering-in-art-an-evolutionary-concept
#19
REVIEW
Anat Hershko Klement, Adrian Shulman
Human chorionic gonadotropin (hCG) is no longer a single, omnipotent ovulation triggering option. Gonadotropin releasing hormone (GnRH) agonist, initially presented as a substitute for hCG, has led to a new era of administering GnRH agonist followed by hCG triggering. According to this new concept, GnRH agonist enables successful ovum maturation, while hCG supports the luteal phase and pregnancy until placental shift.
May 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28508683/effectiveness-of-mild-ovarian-stimulation-versus-gnrh-agonist-protocol-in-women-undergoing-assisted-reproductive-technology-a-meta-analysis
#20
Yuan Fan, Xiaowei Zhang, Zhidong Hao, Huanfei Ding, Quanyu Chen, Li Tian
OBJECTIVE: our meta-analysis was conducted to evaluate the effectiveness of the mild ovulation induction protocol using CC/gonadotropin/GnRH antagonist compared to the conventional GnRH agonist protocol in women undergoing ART. METHOD: Six electronic databases were searched from their date of establishment until August 2016. Outcomes in our analysis were calculated in terms of relative risk (RR) and weighted mean differences (WMD) and standard mean differences (SMD) with 95% confidence intervals (CI) using random effect models or fixed effect models...
May 16, 2017: Gynecological Endocrinology
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