GnRh Antagonist Protocol With Delayed Start Stimulation in Patients With Poor Ovarian Response

Study Overview
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Brief Summary
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The main outcome measures are the number of dominant follicles (≥13 mm) on the day of hCG trigger and the number of mature (MII) oocytes collected after conventional versus delayed-start ovarian stimulation protocol. Secondary outcome measures are including total number of oocytes retrieved, oocyte maturity rate (number of MII oocytes/total number of oocytes), oocyte yield (total number of oocytes retrieved/ antral follicle count [AFC]), mature oocyte yield (number of mature oocytes retrieved/AFC), total dosage of gonadotropin (recombinant FSH and/or highly purified hMG) needed, number of days needed for ovarian stimulation, quality of obtained embryos, fertilization rate (the proportion of total number of two-pronuclear [2PN] stage zygotes /per total injected MII oocytes), implantation rate (total number of observed gestational sac/ number of transferred embryos) and clinical pregnancy rate (presence of fetal heart beat by transvaginal ultrasound per embryo transfer).

Detailed Description
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One of the principal steps to obtain the favorable success is still related to the number of retrieved oocytes after hormonal stimulation by gonadotropins in combination with GnRH analogues. In the patients with poor ovarian response diagnosis, the limited number of obtained oocytes remains the main obstacle in optimizing the live birth rates. The objective of present study is to evaluate a new procedure to increase a cohort of the growing antral follicles and consequently the number of retrieved oocytes after hormonal stimulation by gonadotropins in combination with GnRH antagonist. In present study, eligible patients with diagnosis poor ovarian responder based on the Bologna criteria are included. Ovarian stimulation procedure will be performed by antagonist protocol. All the patients will be received two tablets daily of Estradiol valerate (Estraval®, 2 mg, Aburaihan Co., Tehran, Iran) starting a week after LH surge until menses. The hormonal evaluation (serum LH and FSH) and basic vaginal ultrasound will be performed before the starting ovarian stimulation on the 2th or 3th day of the menstrual cycle. On this day, the block randomization method will be designed to randomize allocation of patients into groups with blocks of size 4. In the Group A: treatment with GnRH antagonists (Cetrotide®, 0.25 mg cetrorelix acetate, Serono, Inc) will be started on the 2th or 3th day of the menstrual cycle and continues until the ninth day. Then, the ovarian stimulation with gonadotropin 300 IU recombinant FSH (Gonal - F®, Serono Laboratories Ltd, Geneva, Switzerland) and 150 IU of hMG (Menopur®; Ferring) will be started from ninth day of menstrual cycle until the day of hCG administration. The monitoring of ovarian stimulation will be done every other day by vaginal ultrasound and whenever at least 1 to 3 follicles larger than 13 mm are observed, the antagonist injection (Cetrotide®, 0.25 mg cetrorelix acetate, Serono, Inc) will be started again to prevent premature LH surge and continues until the prescription of hCG. When at least two follicles greater than 17 to 18 mm is seen, two pre-filled syringes of recombinant human chorionic gonadotropin (rhCG) (Ovitrelle®, 250 μg/0.5 ml, Merck, Serono, Inc) will be administered. The patients will undergo puncture operation 32-34 hours after hCG injection. In the control group (B), as conventional antagonist procedure, the ovarian stimulation with gonadotropin 300 IU recombinant FSH (Gonal - F®, Serono Laboratories Ltd, Geneva, Switzerland) and 150 IU of hMG ( Menopur®; Ferring ) will be started from on the 2th or 3th day of the menstrual cycle. The monitoring of ovarian stimulation will be done every other day by vaginal ultrasound and whenever at least 1 to 3 follicles larger than 13 mm are observed, the antagonist injection (Cetrotide®, 0.25 mg cetrorelix acetate, Serono, Inc) will be started again to prevent premature LH surge and continues until the prescription of rhCG. 32-34 hours after the rhCG injection, the ovum pick up will be performed and subsequently intracytoplasmic sperm injection (ICSI) /in-vitro fertilization (IVF) will be done for all the patients.

Official Title
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Evaluation of a Novel  Delayed Start Protocol With Gonadotropin-releasing Hormone Antagonist in Poor Responders: A Randomized Clinical Trial Phase 3

Conditions
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Infertility, Female

Intervention / Treatment
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* Procedure: delayed start
* Procedure: Conventional


Participation Criteria
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Eligibility Criteria
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Poor ovarian response is defined according to the Bologna criteria and existence of at least two of the following criteria: a previous history of POR (retrieved oocytes ≤3) in a conventional stimulation protocol, advanced maternal age (≥40 years) or any other risk factors for POR (e.g. a history of ovarian surgery) abnormal ovarian reserve test (i.e. antral follicle count (AFC) < 5 follicles or anti-Mȕllerian hormone (AMH) < 1.1 ng/ml) Exclusion Criteria: Premature ovarian failure (basal follicle stimulating hormone (FSH) above 20 IU/l or no antral follicle in ultrasound examination), ِDonor/recipient treatments, Metabolic or endocrine disorders including hyperprolactinoma and hypo/hyperthyroidism, endometriosis, Body mass index > 30 kg/m2, azoospermic male partner. A minimum of 2 or more month's interval from the previous ovarian stimulation is considered to prevent any potential source of error.
Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: delayed start antagonist<br>60 women with poor ovarian responses undergo ovarian stimulation with delayed start antagonist. | Procedure: delayed start<br>* In this protocol, ovarian stimulation will be started from ninth day of menstrual cycle .<br>|
| Experimental: conventional antagonist<br>60 women with diagnose of poor ovarian response will have undergone ovarian stimulation with conventional antagonist protocol. | Procedure: Conventional<br>* In this protocol, ovarian stimulation will be started from the 2th or 3th day of the menstrual cycle.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| number of dominant follicles (≥13 mm) | The number of dominant follicles (≥13 mm) on the day of hCG trigger | 24h after rhCG injection | 
| Total number of oocytes | the number of mature oocytes collected after conventional versus delayed-start ovarian stimulation protocol | 32-34 hours after rhCG | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Total number of retrieved oocytes | Total number of retrieved oocytes 32-34 hours after rhCG injection . | 32-34 hours after rhCG injection | 
| Quality of obtained embryos | we score embryo quality according to the following quality criteria: Excellent (Day 3: 6-8 even size blastomeres with ≤10% fragmentation), Good (Day 3: 6-8 even or uneven size blastomeres with 10%-20% fragmentation), Poor (Uneven and few blastomeres with >20% fragmentation) | on the third day after oocyte retrieval | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Poor ovarian response gonadotropins antagonist