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Gnrh agonist trigger

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https://www.readbyqxmd.com/read/27865446/the-use-of-utrogestan-during-controlled-ovarian-hyperstimulation-in-normally-ovulating-women-undergoing-in%C3%A2-vitro-fertilization-or-intracytoplasmic-sperm-injection-treatments-in-combination-with-a-freeze-all-strategy-a-randomized-controlled-dose-finding-study
#1
Xiuxian Zhu, Hongjuan Ye, Yonglun Fu
OBJECTIVE: To compare the clinical characteristics in a Utrogestan and hMG protocol with the use of different doses of Utrogestan in normally ovulating women undergoing in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI) treatments. DESIGN: Prospective controlled study. SETTING: Tertiary-care academic medical center. PATIENT(S): A total of 150 infertile patients undergoing IVF/ICSI treatments. INTERVENTION(S): Utrogestan and hMG were administered simultaneously beginning on cycle day 3...
November 16, 2016: Fertility and Sterility
https://www.readbyqxmd.com/read/27803584/gonadotropin-releasing-hormone-agonist-trigger-is-a-better-alternative-than-human-chorionic-gonadotropin-in-pcos-undergoing-ivf-cycles-for-an-ohss-free-clinic-a-randomized-control-trial
#2
Deepika Krishna, Snehal Dhoble, Gautham Praneesh, Suvarna Rathore, Amit Upadhaya, Kamini Rao
OBJECTIVE: The objective of this study is to evaluate if gonadotropin-releasing hormone agonist (GnRHa) trigger is a better alternative to human chorionic gonadotropin (hCG) in polycystic ovary syndrome (PCOS) of Indian origin undergoing in vitro fertilization (IVF) cycles with GnRH antagonist for the prevention of ovarian hyperstimulation syndrome (OHSS). DESIGN: Prospective randomized control trial. SETTING: Tertiary care center. MATERIALS AND METHODS: A total of 227 patients diagnosed with PCOS, undergoing IVF in an antagonist protocol were recruited and randomly assigned into two groups: Group A (study group): GnRHa trigger 0...
July 2016: Journal of Human Reproductive Sciences
https://www.readbyqxmd.com/read/27771155/final-oocyte-maturation-with-two-different-gnrh-agonists-in-antagonist-co-treated-cycles-at-risk-of-ovarian-hyperstimulation-syndrome
#3
Yavuz Emre Şükür, Batuhan Özmen, Elif Didem Özdemir, Mehmet Murat Seval, Erkan Kalafat, Murat Sönmezer, Bülent Berker, Ruşen Aytaç, Cem Somer Atabekoğlu
Triptorelin 0.2 mg and leuprolide 1 mg subcutaneous injections for triggering final follicular maturation were compared in patients with a high risk for ovarian hyperstimulation syndrome (OHSS). Infertile patients treated with GnRH antagonist protocol between January 2014 and March 2016 were recruited. Patients with high serum oestradiol levels on HCG day (>3000 pg/ml) indicating a risk of OHSS consisted of the study groups (A and B). Patients with serum oestradiol levels less than 3000 pg/ml consisted of the control group (C)...
October 17, 2016: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/27764533/signaling-events-associated-with-gonadotropin-releasing-hormone-agonist-induced-hormonal-castration-and-its-reversal-in-canines
#4
Ahmed Bulldan, Mazen Shihan, Sandra Goericke-Pesch, Georgios Scheiner-Bobis
A gonadotropin-releasing hormone agonist (GnRH-A) implant induces hormonal castration in dogs that is associated with reduced prostate and testes size. We address the molecular events associated with hormonal castration by examining GnRH-A effects on expression and phosphorylation of a number of key signaling proteins. Male beagles were treated for 5 months with a GnRH-A implant, and then surgically castrated at 0, 3, 6, 12, and 24 weeks after implant removal; untreated animals served as controls. GnRH-A treatment led to activation of c-Raf, Erk1/2, and p53 in the testes...
October 20, 2016: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/27738657/gnrh-agonist-trigger-versus-hcg-trigger-in-gnrh-antagonist-in-ivf-icsi-cycles-a-review-article
#5
Ashraf Alyasin, Shayesteh Mehdinejadiani, Marzieh Ghasemi
Routinely, a bolus of 5.000-10.000 IU human chorionic gonadotropin (hCG) is used for the final follicular maturation and ovulation as a standard method. HCG has the same effect of luteinizing hormone (LH) with long half-life. It has the long lutheotrophic effect which increases the risk of ovarian hyper stimulation syndrome (OHSS). Recently, gonadotropin-releasing hormone agonist (GnRH-a) trigger has been used for the induction of final follicular maturation and ovulation with the aim of reducing the OHSS risk...
September 2016: International Journal of Reproductive Biomedicine (Yazd, Iran)
https://www.readbyqxmd.com/read/27729967/corifollitropin-stimulation-in-combination-with-gnrh-antagonists-after-estradiol-valerate-pre-treatment-a-pilot-study-on-patientfriendly-ivf
#6
W Decleer, K Verschueren, S Vandeginste, K Osmanagaoglu, P Devroey
OBJECTIVE: To demonstrate the feasibility of scheduling an IVF cycle, without disadvantages, in the new patient friendly stimulation protocol using the long acting Corifollitropin Alfa, in combination with GnRH-antagonist protection and GnRH-agonist triggering. STUDY DESIGN: Two groups of ten patients were admitted in the study. Both received the same stimulation protocol with Corifollitropin Alfa in combination with GnRH-antagonist protection. After ultrasound evaluation on day 7 individually dosed Menopur was added...
December 28, 2015: Facts, Views & Vision in ObGyn
https://www.readbyqxmd.com/read/27672360/glucagon-like-peptide-1-excites-firing-and-increases-gabaergic-miniature-postsynaptic-currents-mpscs-in-gonadotropin-releasing-hormone-gnrh-neurons-of-the-male-mice-via-activation-of-nitric-oxide-no-and-suppression-of-endocannabinoid-signaling-pathways
#7
Imre Farkas, Csaba Vastagh, Erzsébet Farkas, Flóra Bálint, Katalin Skrapits, Erik Hrabovszky, Csaba Fekete, Zsolt Liposits
Glucagon-like peptide-1 (GLP-1), a metabolic signal molecule, regulates reproduction, although, the involved molecular mechanisms have not been elucidated, yet. Therefore, responsiveness of gonadotropin-releasing hormone (GnRH) neurons to the GLP-1 analog Exendin-4 and elucidation of molecular pathways acting downstream to the GLP-1 receptor (GLP-1R) have been challenged. Loose patch-clamp recordings revealed that Exendin-4 (100 nM-5 μM) elevated firing rate in hypothalamic GnRH-GFP neurons of male mice via activation of GLP-1R...
2016: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/27662416/gnrh-agonist-trigger-with-intensive-luteal-phase-support-vs-human-chorionic-gonadotropin-trigger-in-high-responders-an-observational-study-reporting-pregnancy-outcomes-and-incidence-of-ovarian-hyperstimulation-syndrome
#8
Georgios Christopoulos, Antonios Vlismas, Anna Carby, Stuart Lavery, Geoffrey Trew
A retrospective, cohort study of high-risk patients undergoing IVF treatment was performed to assess if there is a difference in clinical pregnancy rate, live birth rate and the incidence of ovarian hyperstimulation syndrome, when a GnRH agonist (GnRHa) trigger with intensive luteal support is compared to human chorionic gonadotropin (hCG) with standard luteal support. The control group consisted of 382 high-risk patients having a GnRH antagonist protocol with 194 receiving an hCG trigger. All patients had ≥18 follicles ≥11mm or serum oestradiol >18,000pmol/l on the day of trigger...
September 2016: Human Fertility: Journal of the British Fertility Society
https://www.readbyqxmd.com/read/27609984/the-effect-of-an-immediate-frozen-embryo-transfer-following-a-freeze-all-protocol-a-retrospective-analysis-from-two-centres
#9
Samuel Santos-Ribeiro, Nikolaos P Polyzos, Vuong Thi Ngoc Lan, Johannie Siffain, Shari Mackens, Lisbet Van Landuyt, Herman Tournaye, Christophe Blockeel
STUDY QUESTION: Does the timing of the first frozen embryo transfer (FET) after gonadotropin-releasing hormone (GnRH) agonist triggering with the elective cryopreservation of all embryos affect pregnancy outcome? SUMMARY ANSWER: FETs performed immediately after a freeze-all cycle did not vary significantly from delayed FETs in terms of pregnancy rates. WHAT IS KNOWN ALREADY: As interest in, and use of, the freeze-all strategy expands in the field of reproductive medicine, the optimal timing to perform the subsequent FET has become increasingly important...
November 2016: Human Reproduction
https://www.readbyqxmd.com/read/27560548/evolution-of-the-hypothalamic-pituitary-gonadal-axis-regulation-in-vertebrates-revealed-by-knockout-medaka
#10
Akiko Takahashi, Shinji Kanda, Tomohiro Abe, Yoshitaka Oka
Reproduction is essential for life, but its regulatory mechanism is diverse. The analysis of this diversity should lead us to understand the evolutionary process of the regulation of reproduction. In mammals, the hypothalamic-pituitary-gonadal axis plays an essential role in such regulation, and each component, hypothalamic GnRH, and pituitary gonadotropins, LH, and FSH, is indispensable. However, the common principle of the hypothalamic-pituitary-gonadal axis regulation among vertebrates remains unclear. Here, we used a teleost medaka, which is phylogenetically distant from mammals, and analyzed phenotypes of gene knockouts (KOs) for GnRH, LH, and FSH...
October 2016: Endocrinology
https://www.readbyqxmd.com/read/27490046/dual-trigger-for-final-oocyte-maturation-improves-the-oocyte-retrieval-rate-of-suboptimal-responders-to-gonadotropin-releasing-hormone-agonist
#11
Xuefeng Lu, Qingqing Hong, LiHua Sun, Qiuju Chen, Yonglun Fu, AiAi, Qifeng Lyu, Yanping Kuang
OBJECTIVE: To identify the risk factors for suboptimal response to GnRH agonist (GnRH-a) trigger and evaluate the effect of hCG on the outcome of patients with suboptimal response to GnRH-a. DESIGN: A retrospective data analysis. SETTING: A tertiary-care academic medical center. PATIENT(S): A total of 8,092 women undergoing 8,970 IVF/intracytoplasmic sperm injection (ICSI) treatment cycles. INTERVENTION(S): All women underwent hMG + medroxyprogesterone acetate (MPA)/P treatment cycles during IVF/ICSI, which were triggered using a GnRH-a alone or in combination with hCG (1,000, 2,000, or 5,000 IU)...
August 1, 2016: Fertility and Sterility
https://www.readbyqxmd.com/read/27451069/-is-gonadotropin-releasing-hormone-gnrh-agonist-trigger-beneficial-or-deleterious
#12
M Le Chatton, C Wittemer, T Schweitzer, F Lestrade, J-P Ragage
OBJECTIVES: The undeniable asset of the antagonist protocols in in vitro fertilization is the decrease of the risks of ovarian hyperstimulation syndrome, by the use of a release by GnRH agonist. Nevertheless, questioning persist concerning the rates of clinical pregnancies, the oocyte quantity and the empty follicle syndrome. We thus studied these parameters in our center. METHODS: A retrospective study was realized from January 1st, 2013 till July 31st, 2015...
July 2016: Gynécologie, Obstétrique & Fertilité
https://www.readbyqxmd.com/read/27441046/resurgence-of-minimal-stimulation-in-vitro-fertilization-with-a-protocol-consisting-of-gonadotropin-releasing-hormone-agonist-trigger-and-vitrified-thawed-embryo-transfer
#13
REVIEW
John Zhang
Minimal stimulation in vitro fertilization (mini-IVF) consists of a gentle controlled ovarian stimulation that aims to produce a maximum of five to six oocytes. There is a misbelief that mini-IVF severely compromises pregnancy and live birth rates. An appraisal of the literature pertaining to studies on mini-IVF protocols was performed. The advantages of minimal stimulation protocols are reported here with a focus on the use of clomiphene citrate (CC), gonadotropin releasing hormone (GnRH) ago- nist trigger for oocyte maturation, and freeze-all embryo strategy...
July 2016: International Journal of Fertility & Sterility
https://www.readbyqxmd.com/read/27428219/the-utrogestan-and-hmg-protocol-in-patients-with-polycystic-ovarian-syndrome-undergoing-controlled-ovarian-hyperstimulation-during-ivf-icsi-treatments
#14
Xiuxian Zhu, Hongjuan Ye, Yonglun Fu
Poor oocyte quality is a main concern for decreased reproductive outcomes in women with polycystic ovarian syndrome (PCOS) during controlled ovarian hyperstimulation (COH). A primary way to improve oocyte quality is to optimize the COH protocol. It was demonstrated that the viable embryo rate per oocyte retrieved in the Utrogestan and hMG protocol, a novel regimen based on frozen-thawed embryo transfer (FET), is statistically higher than that in the short protocol. Thus, a retrospective study was conducted to evaluate the endocrine characteristics and clinical outcomes in PCOS patients subjected to the Utrogestan and hMG protocol compared with those subjected to the short protocol...
July 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27349252/gnrh-agonist-with-low-dose-hcg-dual-trigger-is-associated-with-higher-risk-of-severe-ovarian-hyperstimulation-syndrome-compared-to-gnrh-agonist-alone
#15
Kathleen E O'Neill, Suneeta Senapati, Ivy Maina, Clarisa Gracia, Anuja Dokras
PURPOSE: The purpose of this study was to compare rates of ovarian hyperstimulation syndrome (OHSS) after using gonadotropin-releasing hormone agonists (GnRHa) alone and GnRHa in combination with low-dose human chorionic gonadotropin (hCG, dual trigger) for final oocyte maturation in women undergoing controlled ovarian hyperstimulation (COH). METHODS: A retrospective cohort study was conducted at an academic center. Study population included 108 women who received GnRHa trigger and 66 women who received dual trigger (GnRHa + low-dose [1000 IU] hCG trigger)...
September 2016: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/27343272/ovarian-hyperstimulation-syndrome-review-and-new-classification-criteria-for-reporting-in-clinical-trials
#16
P Humaidan, S M Nelson, P Devroey, C C Coddington, L B Schwartz, K Gordon, J L Frattarelli, B C Tarlatzis, H M Fatemi, P Lutjen, B J Stegmann
STUDY QUESTION: What is an objective approach that employs measurable and reproducible physiologic changes as the basis for the classification of ovarian hyperstimulation syndrome (OHSS) in order to facilitate more accurate reporting of incidence rates within and across clinical trials? SUMMARY ANSWER: The OHSS flow diagram is an objective approach that will facilitate consistent capture, classification and reporting of OHSS within and across clinical trials. WHAT IS KNOWN ALREADY: OHSS is a potentially life-threatening iatrogenic complication of the early luteal phase and/or early pregnancy after ovulation induction (OI) or ovarian stimulation (OS)...
September 2016: Human Reproduction
https://www.readbyqxmd.com/read/27341989/standard-human-chorionic-gonadotropin-versus-double-trigger-for-final-oocyte-maturation-results-in-different-granulosa-cells-gene-expressions-a-pilot-study
#17
Jigal Haas, Libby Ophir, Eran Barzilay, Ronit Machtinger, Yuval Yung, Raoul Orvieto, Ariel Hourvitz
OBJECTIVE: To investigate the messenger RNA (mRNA) expression of reproduction-related genes in granulosa cells (GCs) of patients triggered with hCG compared with patients triggered with GnRH agonist and hCG (double trigger) for final oocyte maturation. DESIGN: Granulosa cells were obtained at the time of oocyte retrieval, and gene expression was analyzed using quantitative real-time polymerase chain reaction. SETTING: Referral center. PATIENT(S): Fifteen women undergoing controlled ovarian hyperstimulation for IVF who received hCG for final follicular maturation and in a subsequent IVF cycle received double trigger...
September 1, 2016: Fertility and Sterility
https://www.readbyqxmd.com/read/27341988/assessing-the-adequacy-of-gonadotropin-releasing-hormone-agonist-leuprolide-to-trigger-oocyte-maturation-and-management-of-inadequate-response
#18
Frank E Chang, Stephanie A Beall, Jeris M Cox, Kevin S Richter, Alan H DeCherney, Michael J Levy
OBJECTIVE: To compare outcomes of in vitro fertilization (IVF) cycles with adequate versus inadequate response to the gonadotropin-releasing hormone (GnRH) agonist trigger rescued with the use of human chorionic gonadotropin (hCG) retrigger, and to identify risk factors associated with an inadequate trigger. DESIGN: Retrospective cohort study. SETTING: Private practice. PATIENT(S): Women at high risk for ovarian hyperstimulation syndrome who underwent an autologous IVF cycle and used GnRH agonist to trigger oocyte maturation before oocyte retrieval...
October 2016: Fertility and Sterility
https://www.readbyqxmd.com/read/27275861/combined-ovulation-triggering-with-gnrh-agonist-and-hcg-in-ivf-patients
#19
Miro Kasum, Kristijan Kurdija, Slavko Orešković, Ermin Čehić, Dinka Pavičić-Baldani, Lana Škrgatić
The aim of the review is to analyse the combination of a gonadotrophin releasing hormone (GnRH) agonist with a human chorionic gonadotrophin (hCG) trigger, for final oocyte maturation in in vitro fertilisation (IVF) cycles. The concept being a ''dual trigger'' combines a single dose of the GnRH agonist with a reduced or standard dosage of hCG at the time of triggering. The use of a GnRH agonist with a reduced dose of hCG in high responders demonstrated luteal phase support with improved pregnancy rates, similar to those after conventional hCG and a low risk of ovarian hyperstimulation syndrome (OHSS)...
June 8, 2016: Gynecological Endocrinology
https://www.readbyqxmd.com/read/27273307/pathophysiology-treatment-and-prevention-of-ovarian-hyperstimulation-syndrome
#20
Michele Kwik, Elizabeth Maxwell
PURPOSE OF REVIEW: Severe ovarian hyperstimulation syndrome (OHSS) is an iatrogenic condition that affects 1% of women that undergo treatment with assisted reproductive technology. The review aims to summarize recent evidence on pathophysiology, treatment, and prevention of OHSS. RECENT FINDINGS: The pathophysiology is still not completely understood; however, vascular endothelial growth factor is likely to be an important mediator. Human chorionic gonadotropin was previously thought to be necessary for OHSS to occur; however, recent case reports have proven otherwise...
August 2016: Current Opinion in Obstetrics & Gynecology
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