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GnRH Antagonist

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https://www.readbyqxmd.com/read/29675483/fresh-versus-frozen-embryo-transfer-after-gonadotropin-releasing-hormone-agonist-trigger-in-gonadotropin-releasing-hormone-antagonist-cycles-among-high-responder-women-a-randomized-multi-center-study
#1
Abbas Aflatoonian, Mahnaz Mansoori-Torshizi, Maryam Farid Mojtahedi, Behrouz Aflatoonian, Mohammaad Ali Khalili, Mohammad Hossein Amir-Arjmand, Mehrdad Soleimani, Nastaran Aflatoonian, Homa Oskouian, Nasim Tabibnejad, Peter Humaidan
Background: The use of embryo cryopreservation excludes the possible detrimental effects of ovarian stimulation on the endometrium, and higher reproductive outcomes following this policy have been reported. Moreover, gonadotropin-releasing hormone agonist trigger in gonadotropin-releasing hormone (GnRH) antagonist cycles as a substitute for standard human chorionic gonadotropin trigger, minimizes the risk of ovarian hyperstimulation syndrome (OHSS) in fresh as well as frozen embryo transfer cycles (FET)...
January 2018: International Journal of Reproductive Biomedicine (Yazd, Iran)
https://www.readbyqxmd.com/read/29658351/high-estrogen-exposure-may-not-be-detrimental-on-endometrial-receptivity-in-women-with-pcos
#2
Cigdem Abide Yayla, Enis Ozkaya, Gulay Beydilli Nacak, Ilhan Sanverdi, Belgin Devranoglu, Evrim Bostanci Ergen, Cetin Kilicci, Tayfun Kutlu
The study aimed to assess the effect of high estrogen exposure and coasting on cycle outcome in women at risk for developing ovarian hyperstimulation syndrome (OHSS). Retrospective case-control study was conducted to figure out the outcomes of GnRH antagonist cycles in which women were at risk to develop OHSS. Women who underwent coasting (n = 100) were compared with a control group of women who did not undergo coasting (n = 287). Effect of endometrial estrogen exposure was determined by calculating area under curve of temporal estrogen measurements (AUCEM) through the cycle...
April 14, 2018: Gynecological Endocrinology
https://www.readbyqxmd.com/read/29648476/does-the-type-of-gnrh-analogue-used-affect-live-birth-rates-in-women-with-endometriosis-undergoing-ivf-icsi-treatment-according-to-the-rafs-stage
#3
Panagiotis Drakopoulos, Jérôme Rosetti, Nicola Pluchino, Christophe Blockeel, Samuel Santos-Ribeiro, Michael de Brucker, Petros Drakakis, Michel Camus, Herman Tournaye, Nikolaos P Polyzos
Since the introduction of gonadotropin-releasing hormone (GnRH) antagonists, an extensive amount of literature investigating the role of the downregulation protocols on pregnancy outcomes has been published. However, these studies were mainly performed in the general infertile population where patients with endometriosis were often excluded or underrepresented. This study is a large retrospective cohort study including 386 endometriosis patients undergoing IVF/ICSI, who had been previously classified according to the rAFS system...
April 12, 2018: Gynecological Endocrinology
https://www.readbyqxmd.com/read/29609229/-cumulative-live-birth-rates-per-oocytes-retrieved-cycle-evaluation-of-clinical-outcomes-of-ivf-icsi
#4
C X Wu, T Zhang, L Shu, J Huang, F Y Diao, W Ding, Y Gao, W Wang, Y D Mao, Y G Cui, J Y Liu
Objective: Using of cumulative live birth rate (CLBR) per oocytes retrieved cycle, to assess the clinical outcomes of in vitro fertilization or intracytoplasmic sperm injection (IVF/ICSI) , and to explore impact factors on CLBR following utilization of all fresh and frozen embryos in one complete IVF/ICSI cycle using gonadotropin-releasing hormone (GnRH) agonist, GnRH-antagonist and clomiphene mild stimulation protocols. Methods: Of the patients who underwent IVF/ICSI from January 1st, 2014 to December 31st, 2015 in the First Affiliated Hospital, Nanjing Medical University, a total of 6 142 oocytes retrieved cycles were included...
March 25, 2018: Zhonghua Fu Chan Ke za Zhi
https://www.readbyqxmd.com/read/29605403/cycle-day-estrogen-level-and-lead-follicle-size-analysis-of-27-790-in-vitro-fertilization-cycles-to-determine-optimal-start-criteria-for-gonadotropin-releasing-hormone-antagonist
#5
Brianna M Lyttle Schumacher, Jennifer E Mersereau, Anne Z Steiner
OBJECTIVE: To determine the optimal criteria at which to start GnRH antagonists during controlled ovarian hyperstimulation (COH) for in vitro fertilization (IVF). DESIGN: Retrospective clinical cohort. SETTING: IVF clinics. PATIENT(S): Women undergoing fresh autologous IVF using GnRH antagonist for ovulation suppression during COH. INTERVENTION(S): Measurement of lead follicle size, E2 level, and cycle day of stimulation on day of antagonist initiation...
March 28, 2018: Fertility and Sterility
https://www.readbyqxmd.com/read/29600322/dual-triggering-with-gnrh-agonist-plus-hcg-versus-triggering-with-hcg-alone-for-ivf-icsi-outcome-in-gnrh-antagonist-cycles-a-systematic-review-and-meta-analysis
#6
REVIEW
Chi-Huang Chen, Chii-Ruey Tzeng, Peng-Hui Wang, Wei-Min Liu, Heng-Yu Chang, Huang-Hui Chen, Ching-Hui Chen
PURPOSE: To summarize available evidence from randomized-controlled trials which have evaluated triggering of final oocyte maturation with concomitant GnRH agonists and hCG in patients undergoing IVF, and to analyze whether dual triggering is as efficacious as hCG triggering in terms of oocyte and pregnancy outcomes. METHODS: A comprehensive literature search was performed to identify randomized-controlled trials comparing IVF outcomes between women receiving combined administration of hCG with GnRH agonists and those receiving hCG alone for triggering of final oocyte maturation...
March 29, 2018: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/29580040/adverse-effects-of-vincristine-chemotherapy-on-cell-changes-in-seminiferous-tubules-and-cetrorelix-gnrh-antagonist-inhibitory-effects-in-mice
#7
Fatemeh Nikpour, Hamid Tayefi, Daryosh Mohammadnejad, Abolfazl Akbarzadeh
The present study was designed to determine changes in spermatogenesis in adult mice after an intraperitoneal injection of vincristine. The effect of a GnRH antagonist synchronous to chemotherapy, which might protect spermatogenesis by halting cell division in spermatogenic cells, was also investigated. Method and Materials: A total of 30 adult male mice were studied in three equal groups of ten. In the V group, a single dose of the chemotherapy drug vincristine was injected intraperitonally at 1.5 mg/kg. In the V+C, group, the injection of Cetrorelix was started, and one week before to one week after vincristine injection continued ( for 3 weeks)...
March 27, 2018: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/29579710/bu-shen-zhu-yun-decoction-promotes-synthesis-and-secretion-of-fsh%C3%AE-and-lh%C3%AE-in-anterior-pituitary-cells-in-vitro
#8
Xiaofei Jiang, Huifang Zhou, Mingqing Shi, Boru Zhou, Bei Liu, Yizhen Yuan, Jinjun Shan, Jianya Xu, Tong Xie
Luteal phase defects (LPD) are an important etiology of infertility which has increased in recent years. Studies have shown that bu-shen-zhu-yun decoction (BSZY-D) can lower the expression of estrogen receptor and progesterone receptor, in rats endometrium of embryonic implantation period, which upregulated by mifepristone, and improve uterine receptivity. The aim of present study was to determine the effect of BSZY-D on the synthesis and secretion of gonadotropic hormones in the anterior pituitary cells of rats...
March 23, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29562260/towards-an-optimal-luteal-support-modality-in-agonist-triggered-cycles-a-randomized-clinical-trial
#9
E A Elgindy, H Sibai, M I Mostafa, A Gibreel, E Darwish, H Maghraby
STUDY QUESTION: In ICSI patients with high risk of ovarian hyperstimulation syndrome (OHSS), are antagonist cycles triggered by gonadotropin releasing hormone (GNRH) agonist with a specialized luteal support regimen associated with comparable ongoing pregnancy rate (OPR) and less OHSS than those triggered by hCG? SUMMARY ANSWER: In antagonist ICSI cycles, GnRH agonist triggering with a specialized luteal support regimen is associated with comparable OPR to those triggered by hCG but may be less likely to be associated with OHSS...
March 19, 2018: Human Reproduction
https://www.readbyqxmd.com/read/29549187/stimulation-of-growth-hormone-by-kisspeptin-antagonists-in-ewes
#10
Jeremy T Smith, Antonia Roseweir, Michael Millar, Iain Clarke, Robert P Millar
Kisspeptin signalling is indispensable for fertility, stimulating gonadotropin- releasing hormone (GnRH) secretion and mediating gonadal steroid feedback on GnRH neurons. Moreover, kisspeptin neurons have been implicated in other non-reproductive neuroendocrine roles. Kisspeptin appears to also regulate growth hormone secretion but much of the data appear contradictory. We sought to clarify a potential role of kisspeptin in GH regulation by examining the effect of kisspeptin antagonists on growth hormone (GH) secretion in ewes under various physiological conditions...
March 16, 2018: Journal of Endocrinology
https://www.readbyqxmd.com/read/29545772/a-proof-of-concept-clinical-trial-of-a-single-luteal-use-of-long-acting-gonadotropin-releasing-hormone-antagonist-degarelix-in-controlled-ovarian-stimulation-for-in-vitro-fertilization-long-antagonist-protocol
#11
Evangelos G Papanikolaou, Hakan Yarali, Evi Timotheou, Michael Grynberg, Odysseas Zafeiratis, Herman Tournaye, Robert Najdecki
Introduction: A drawback of gonadotropin-releasing hormone (GnRH) antagonist protocols in in vitro fertilization (IVF) is that they have limited flexibility in cycle programming. This proof of concept study explored the efficacy of a single-dose, long-acting GnRH antagonist IVF protocol. Trial registration number is NCT03240159, retrospectively registered on March 08, 2017. Materials and methods: The efficacy of a single-dose long-acting antagonist, degarelix, was explored initially in healthy donors and subsequently in infertile patients...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29544634/gnrh-in-the-human-female-reproductive-axis
#12
Patrizia Limonta, Marina Montagnani Marelli, Roberta Moretti, Monica Marzagalli, Fabrizio Fontana, Roberto Maggi
Gonadotropin-releasing hormone (GnRH) is recognized as the central regulator of the functions of the pituitary-gonadal axis. The increasing knowledge on the mechanisms controlling the development and the function of GnRH-producing neurons is leading to a better diagnostic and therapeutic approach for hypogonadotropic hypogonadisms and for alterations of the puberty onset. During female life span, the function of the GnRH pulse generator may be affected by a number of inputs from other neuronal systems, offering alternative strategies for diagnostic and therapeutic interventions...
2018: Vitamins and Hormones
https://www.readbyqxmd.com/read/29542120/the-effect-of-premature-luteinizing-hormone-increases-among-high-ovarian-responders-undergoing-a-gonadotropin-releasing-hormone-antagonist-ovarian-stimulation-protocol
#13
Yudi Geng, Qiaohong Lai, Yang Xun, Lei Jin
OBJECTIVE: To explore factors causing a premature rise in luteinizing hormone among high ovarian responders undergoing the gonadotropin-releasing hormone (GnRH) antagonist ovarian stimulation protocol. METHODS: The present retrospective study included healthy women undergoing fresh cycles using a fixed GnRH antagonist protocol with a predicted high response and antral follicle count (AFC) of at least 15 at the Reproductive Medicine Center of Tongji Hospital, China, between January 1 and December 31, 2016...
March 15, 2018: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/29530558/-new-medical-treatments-for-painful-endometriosis-cngof-has-endometriosis-guidelines
#14
G Legendre, L Delbos, E Hudon, N Chabbert-Buffet, S Geoffron, M Sauvan, H Fernandez, P-E Bouet, P Descamps
OBJECTIVE: The objective of this work is to evaluate the place of new treatments in the management of endometriosis outside the context of infertility. METHODS: A review of the literature was conducted by consulting Medline data until July 2017. RESULTS: Dienogest is effective compared to placebo in short term (NP2) and long term (NP4) for the treatment of painful endometriosis. In comparison with GnRH agonists, dienogest is also effective in terms of decreased pain and improved quality of life in non-operated patients (NP2) as well as for recurrence of lesions and symptomatology postoperatively (NP2)...
March 9, 2018: Gynecologie, Obstetrique, Fertilite & Senologie
https://www.readbyqxmd.com/read/29523480/-management-by-assisted-reproductive-technology-in-women-with-endometriosis-cngof-has-endometriosis-guidelines
#15
C Chauffour, J-L Pouly, A-S Gremeau
Should the presence of endometriosis change the management of assisted reproductive technology? There is no difference in pregnancy rate after IVF between an agonist or antagonist protocol in patients with endometriosis, so the choice between one or the other of these protocols is free. But the review of the literature has shown an improvement in the chances of pregnancy in case of prolonged ovulation suppression before stimulation for IVF with a GnRH agonist analogue or with oral contraception, especially in cases of severe endometriosis...
March 6, 2018: Gynecologie, Obstetrique, Fertilite & Senologie
https://www.readbyqxmd.com/read/29516855/dual-trigger-with-gonadotropin-releasing-hormone-and-human-chorionic-gonadotropin-for-poor-responders
#16
Ahmet Eser, Belgin Devranoğlu, Evrim Bostancı Ergen, Ciğdem Yayla Abide
OBJECTIVE: To compare metaphase II (MII) rate, fertilization rate and embryo quality with dual trigger gonadotropin-releasing hormone agonist (GnRH) and normal dose human chorionic gonadotropin (hCG) versus normal dose hCG trigger in antagonist intracytoplasmic sperm injection (ICSI) cycles of poor ovarian responders. MATERIAL AND METHODS: Patients defined poor ovarian responder according to Bologna criteria who underwent ICSI with GnRH antagonist protocol and triggered with dual trigger or hCG alone for oocyte maturation...
March 8, 2018: Journal of the Turkish German Gynecological Association
https://www.readbyqxmd.com/read/29510633/-medroxyprogesteron-acetate-use-to-block-lh-surge-in-oocyte-donor-stimulation
#17
I Crha, P Ventruba, E Filipinská, M Dziakova, J Žáková, M Ješeta, E Lousová, Z Papíková
OBJECTIVE: To compare the results of ovarian stimulation with LH surge blockade by medroxyprogesterone acetate or GnRH antagonist in oocytes donors. To present current options of exogenous and endogenous progestins instead of GnRH analogues to block LH surge during ovarian stimulation. DESIGN: Retrospective study of oocyte donor cycles and literature review. SETTING: Department of Obstetrics and Gynecology, Faculty of Medicine, Masaryk university and University Hospital Brno...
2018: Ceská Gynekologie
https://www.readbyqxmd.com/read/29497400/luteal-coasting-and-individualization-of-human-chorionic-gonadotropin-dose-after-gonadotropin-releasing-hormone-agonist-triggering-for-final-oocyte-maturation-a-retrospective-proof-of-concept-study
#18
Barbara Lawrenz, Suzan Samir, Nicolas Garrido, Laura Melado, Nils Engelmann, Human M Fatemi
Ovarian stimulation in a gonadotropin-releasing hormone (GnRH) antagonist protocol with the use of GnRH agonist for final oocyte maturation is the state-of-the-art treatment in patients with an expected or known high response to avoid or at least reduce significantly the risk for development of ovarian hyperstimulation syndrome (OHSS). Due to a shortened LH surge after administration of GnRH agonist in most patients, the luteal phase will be characterized by luteolysis and luteal phase insufficiency. Maintaining a sufficient luteal phase is crucial for achievement of a pregnancy; however, the optimal approach is still under debate...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29481670/impact-of-late-follicular-phase-elevated-serum-progesterone-on-cumulative-live-birth-rates-is-there-a-deleterious-effect-on-embryo-quality
#19
A Racca, S Santos-Ribeiro, N De Munck, S Mackens, P Drakopoulos, M Camus, G Verheyen, H Tournaye, C Blockeel
STUDY QUESTION: Is elevated late-follicular phase progesterone (EP) associated with a deleterious impact on embryo quality (EQ) and cumulative live birth rates (LBRs)? SUMMARY ANSWER: EP was associated with a decrease in embryo utilization and cumulative LBRs. WHAT IS KNOWN ALREADY: Ovarian stimulation promotes the production of progesterone (P) which adversely affects IVF pregnancy outcomes. However, evidence regarding a potential association between EP an EQ is lacking...
February 22, 2018: Human Reproduction
https://www.readbyqxmd.com/read/29479004/neurokinin-b-receptor-agonist-and-dynorphin-receptor-antagonist-stimulated-luteinizing-hormone-secretion-in-fasted-male-rodents
#20
Toshiya Matsuzaki, Altankhuu Tungalagsuvd, Munkhsaikhan Munkhzaya, Takeshi Iwasa, Kiyohito Yano, Yiliyasi Mayila, Takako Tokui, Rie Yanagihara, Sumika Matsui, Takeshi Kato, Akira Kuwahara, Minoru Irahara
Kisspeptin/neurokinin B (NKB)/dynorphin (Dyn) (KNDy) neuron in hypothalamic arcuate nucleus plays a key role in GnRH/LH pulsatile secretion. We aimed to determine whether stimulation of NKB/neurokinin 3 receptor (NK3R) signaling and inhibition of Dyn/kappa-opioid receptor (KOR) signaling recover LH secretion that is suppressed by acute fasting in male rats. Furthermore, we determined dose dependent effect of NKB/NK3R signaling on serum LH level under acute fasting condition in male mice. Mature male rats were injected saline (0...
February 23, 2018: Endocrine Journal
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