scholarly journals Gonadotropin levels at the start of ovarian stimulation predict normal fertilization after hCG re‐trigger in GnRH antagonist cycles

2020 ◽  
Author(s):  
Hiroya Kitasaka ◽  
Mikiko Tokoro ◽  
Masae Kojima ◽  
Noritaka Fukunaga ◽  
Yoshimasa Asada
Keyword(s):  
Ovarian Stimulation ◽  
Gnrh Antagonist ◽  
Normal Fertilization

A Short Ovarian Stimulation Does Not Negatively Impact IVF Pregnancy Rates When Utilizing a GnRH Antagonist Protocol

2005 ◽  
Vol 84 ◽  
pp. S251-S252
Author(s):  
J.L. Eaton ◽  
A. Zimon ◽  
T. Von Wald ◽  
M. Goldman ◽  
M.M. Alper ◽  
...  
Keyword(s):  
Ovarian Stimulation ◽  
Gnrh Antagonist ◽  
Pregnancy Rates ◽  
Gnrh Antagonist Protocol ◽  
Antagonist Protocol

scholarly journals A Novel Nomogram for Individualized Gonadotropin Starting Dose in GnRH Antagonist Protocol

2021 ◽  
Vol 12 ◽  
Author(s):  
Yubin Li ◽  
Yuwei Duan ◽  
Xi Yuan ◽  
Bing Cai ◽  
Yanwen Xu ◽  
...  
Keyword(s):  
Regression Model ◽  
Ovarian Stimulation ◽  
Multivariate Regression ◽  
Gnrh Antagonist ◽  
Bootstrap Resampling ◽  
Multivariate Regression Model ◽  
Starting Dose ◽  
Gnrh Antagonist Protocol ◽  
Antagonist Protocol

Controlled ovarian stimulation (COS) is one of the most vital parts of in vitro fertilization-embryo transfer (IVF-ET). At present, no matter what kinds of COS protocols are used, clinicians have to face the challenge of selection of gonadotropin starting dose. Although several nomograms have been developed to calculate the appropriate gonadotropin starting dose in gonadotropin releasing hormone (GnRH) agonist protocol, no nomogram was suitable for GnRH antagonist protocol. This study aimed to develop a predictive nomogram for individualized gonadotropin starting dose in GnRH antagonist protocol. Single-center prospective cohort study was conducted, with 198 women aged 20-45 years underwent IVF/intracytoplasmic sperm injection (ICSI)-ET cycles. Blood samples were collected on the second day of the menstrual cycle. All women received ovarian stimulation using GnRH antagonist protocol. Univariate and multivariate analysis were performed to identify predictive factors of ovarian sensitivity (OS). A nomogram for gonadotropin starting dose was developed based on the multivariate regression model. Validation was performed using concordance statistics and bootstrap resampling. A multivariate regression model based on serum anti-Müllerian hormone (AMH) level, antral follicle count (AFC), and body mass index (BMI) was developed and accounted for 59% of the variability of OS. An easy-to-use predictive nomogram for gonadotropin starting dose was established with excellent accuracy. The concordance index (C-index) of the nomogram was 0.833 (95% CI, 0.829-0.837). Internal validation using bootstrap resampling further showed the good performance of the nomogram. In conclusion, gonadotropin starting dose in antagonist protocol can be predicted precisely by a novel nomogram.

Effect of GnRH antagonist on vascular endothelial growth factor (VEGF) during ovarian stimulation cycle

2002 ◽  
Vol 78 ◽  
pp. S283-S284
Author(s):  
Antonio Requena ◽  
Juan A Garcia-Velasco ◽  
Amparo Villasante ◽  
Marina Aragones ◽  
Rafaela Scheffer ◽  
...  
Keyword(s):  
Vascular Endothelial Growth Factor ◽  
Growth Factor ◽  
Ovarian Stimulation ◽  
Gnrh Antagonist ◽  
Vascular Endothelial ◽  
Endothelial Growth Factor

P-631 Embryo euploidy rates following follicular or luteal start ovarian stimulation. A prospective study with repeated ovarian stimulation ovarian stimulation cycles

2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
F Martinez ◽  
E Clua ◽  
M Roca ◽  
S Garcia ◽  
M Parriego ◽  
...  
Keyword(s):  
Prospective Study ◽  
Ovarian Stimulation ◽  
Luteal Phase ◽  
Gnrh Antagonist ◽  
Infertile Women ◽  
Oocyte Donors ◽  
A Prospective Study ◽  
Antagonist Protocol ◽  
Euploidy Rates ◽  
Euploidy Rate

Abstract Study question Is there any difference in embryo euploidy rates following luteal phase phase (LS) and follicular phase (FS) start ovarian stimulation. Summary answer The number of euploid blastocysts and embryo euploidy rate are comparable when comparing FS and LS. What is known already Random start ovarian stimulation (starting at any time of the cycle) has been traditionally used in women undergoing urgent fertility preservation for medical reason. Although there is accumulating evidence that in infertile women, LS can result in equivalent number of oocytes and embryos as compared with FS, no study has evaluated the effect of luteal phase start ovarian stimulation on embryo euploidy rates. The current study is the first prospective study designed to evaluate embryo euploidy rates in donors undergoing two identical consecutive ovarian stimulation protocols within a period of 6 months starting either in the (FS), or (LS). Study design, size, duration In a prospective study, conducted between May 2018 and January 2020, 40 oocyte donors underwent two consecutive ovarian stimulation protocols within a period of 6 months with an identical fixed GnRH antagonist protocol starting either in the early follicular (FS), or and luteal menstrual cycle phase (LS). Participants/materials, setting, methods All participants underwent two identical consecutive ovarian stimulation cycles with 150μg corifollitropin alfa followed by 200 IU rFSH in a fixed GnRH antagonist protocol either in the FS or LS. Six MII oocytes from the same oocyte donor, from each stimulation cycle, were allocated to the recipients and were inseminated with the same sperm sample (recipients partner sperm or donor sperm). Embryos were cultivated to blastocyst stage followed by preimplantation genetic testing for aneuploidies (PGT-A). Main results and the role of chance When comparing FP with LP, the duration of ovarian stimulation was significantly shorter (9.68± 2.09 vs 10.93± 1.55 days), 95% CI [-1.95; -0.55] and a higher total additional dose of daily recFSH was significantly lower (526.14± 338.94 IU vs 726.14± 366.27), 95% CI [-315,12; -84,88] when CPT was administered in the luteal phase. . There were no differences in the hormone values on the triggering day (Estradiol 2137.61±1198.25 pg/ml vs 2362.96±1472.89); 95% CI [-1160.45;709.76]. Overall no differences were observed in the number of oocytes (24.84± 11.200 vs 24.27± 9.08); 95% CI[-2,61; 3.75] and MII oocytes (21.41±10.19 vs 21.59± 8.81), 95%CI [-2.72; 2.35] retrieved between FP and LP cycles in the oocytes donors. Following oocyte allocation and fertilization to the recipients, a total of 245 blastocysts were biopsied (blastocyst formation rate 245/408, 60.05%), 117 in FP group and 128 in LP group. The overall blastocyst euploidy rate was 59.18% . There were no differences in the number of euploid embryos between FS (1.59±1.32) and LS (1.70±1.29), mean difference 0.11, 95%CI [-0.65; 0.46]. Finally, there were no differences in the percentage of euploid embryos per oocytes inseminated between FS [70/287 (24.4%)] and LP [75/278 (24.7%), mean difference -0.027, 95%CI [-0.11; 0.06]. Limitations, reasons for caution The study was performed in oocyte derived from potentially fertile young oocyte donors thus caution is needed when extrapolating the results in oocytes derived from infertile women of older age. Wider implications of the findings Luteal phase stimulation does not alter embryo euploidy status as compared with follicular phase stimulation and thus it appears that it can be safely used not only in cases of urgent medical fertility preservation but also in patients undergoing ovarian stimulation for IVF/ICSI. Trial registration number Clinical Trials Gov (NCT03555942).

P–687 Impact of medroxyprogesterone acetate (MPA) as pituitary suppression on oocyte quality and clinical outcomes in egg donation recipients

2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
I Ortega ◽  
P Alamá ◽  
M Cruz ◽  
J Giles ◽  
J A García-Velasco
Keyword(s):  
Oral Administration ◽  
Ovarian Stimulation ◽  
Gnrh Antagonist ◽  
Oocyte Quality ◽  
Follicular Phase ◽  
Egg Donation ◽  
Ovum Donation ◽  
Gnrh Analogues ◽  
Group 2 ◽  
Group 1

Abstract Study question To compare the impact on oocyte quality and reproductive outcomes in patients who received oocytes from donors stimulated with MPA versus GnRH antagonist protocol. Summary answer Compared to GnRH antagonist, MPA does not exert a major effect on oocyte quality and yields similar reproductive outcomes in egg donation recipients. What is known already Conventional ovarian stimulation (OS) protocols have classically used GnRH analogues, both agonists and antagonists, to avoid premature follicular luteinization. The oral administration of MPA or micronized progesterone during the follicular phase of OS has emerged as an attractive alternative to conventional protocols in the prevention of early luteinization. Compared to progesterone, MPA is characterized by a moderate-strong progestanic action, lower androgenic properties and does not interfere with the measurement of endogenous progesterone. In our group, administration of MPA during the follicular phase of OS has been included in the routine clinical practice of our donor program since late 2019. Study design, size, duration Multicentre, retrospective, observational, cohort study carried out in eleven private university-affiliated IVF centers. The present study included a total of 14,282 fresh ovum donation cycles performed from October 2017 to March 2020. Oocyte donors were recruited and stimulated under either MPA (n = 4,665) or GnRHa (n = 9,617) to suppress the pituitary during the follicular phase of OS, and GnRH agonist was administered to trigger final oocyte maturation in all the participants. Participants/materials, setting, methods Recipients were divided according to the protocol used for premature luteinization prevention during the follicular phase of the ovum donation matched-cycle: Group 1, recipients who received oocytes from donors treated with 10 mg/day of MPA (ProgeveraÒ); Group 2, recipients who received oocytes from GnRH antagonist (FyremadelÒ) down-regulated donor cycles. All the procedures were approved by an Institutional Review Board (1910-VLC–091-JG) and complied with Spanish law on assisted reproductive technologies (14/2006). Main results and the role of chance Regarding donoŕs baseline characteristics, age and antral follicle count were significantly different between groups, but not clinical differences. The length of ovarian stimulation was similar in both groups (10.7 days [95% Confidence Interval (CI) 10.5–10–8] vs 10.5 days [95% CI 10.0–11.00]). Despite slightly higher mean total dose of FSH administered in Group 1 compared to Group 2 (1.841 IU [95% CI 1.813–1.868] vs 1.739 IU [95% CI 1.723–1.754]), there were no differences in the total dose of hMG administered between both groups (967 IU [95% CI 901–1.034] vs 971 IU [95% CI 944–998]). With regard to IVF data, both the number of retrieved oocytes (22.9 [95% CI 22.4–23.4] vs 24.1 [95% CI 23.8–24.3]), and mature oocytes (18.7 [95% CI 18.3–19.1] vs 19.3 [95% CI 19.1–19.6]), were slightly lower in Group 1 compared to Group 2, whereas fertilization rate was significantly higher in Group 1 compared to Group 2 (82.1% [95% CI 81.7–82.6] vs 80.8% [95% CI 80.6–81.2]),. Regarding the clinical outcomes, no differences were observed in either implantation rate (58.7% [95% CI 56.7–60.7] vs 59.3% [95% CI 57.3–61.3]) or clinical pregnancy rate (59.5% vs 59.8%, P = 0.04) between both groups. Limitations, reasons for caution As a consequence of being a retrospective study, only association, and not causation, can be inferred from the results. A further limitation is that donors are healthy young women and do not perfectly match other populations, as infertile patients who may be older, low or high responders to OS. Wider implications of the findings: MPA emerges as an effective oral alternative to GnRH analogues for preventing premature luteinizing hormone surges in donors undergoing OS in ovum donation program. Compared with GnRH antagonists, MPA has advantages of being an oral administration route and providing easy access, yielding similar clinical results. Trial registration number 1910-VLC–091-JG

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