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AzTrials

OVARIAN STIMULATIONrFSH and hMGNCT06732843

Does Recombinant FSH (rFSH, i.g. Gonal F®) as Compared to Human Menopausal Gonadotrophin (hMG) Affect Telomere Length of Cumulus Cells During Antral Follicle Growth and Impact Blastocyst Status?

An observational study of OVARIAN STIMULATION and Telomere Length, run by ART Fertility Clinics LLC at 1 site in United Arab Emirates.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

Gonal-F® (follitropin alfa) is a recombinant FSH without LH activity, while Menopur® contains both LH and hCG. The MEGASET trial compared Menopur® and Gonal-F® in GnRH antagonist cycles with SET, showing similar efficacy. Read more about this study

Who is it for?
Ages 18 to 38 years, women onlyHealthy volunteers can take part
How many people
10 participants
Where
1 siteUnited Arab Emirates
Study dates
23 Jul 2025to 31 Jul 2027
How long will I take part?
60 Months
Phase
Observational
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 38 years
  • Women only
  • Healthy volunteers accepted
  • Adult

Study population: Normo-ovarian response patients who undergo an IVF treatment.

Who may be able to join

  • Maternal age 18 - 38 years
  • Patients requested PGT-A
  • BMI 18- 30kg/m2
  • Expected normoresponders
  • Fresh autologous ejaculate (≥5 mill/ml)
  • Sperm abstinence: 2-3 days
Show all 12Show fewer
  • Normal female/male karyotype
  • Regular menstrual cycle length: 25-32 days
  • AFC of 5-10 in each ovary at the beginning of the stimulation
  • Trigger: dual trigger: 2.500 IU urinary hCG + 0.3 mg Decapeptyl. (13)
  • A wash-out period between 1 to 3 months; an inter-cycle variation of 10% in AFC, measured by the same physician, is accepted.
  • Couple agrees to perform two stimulations before continuing with embryo transfer

Who cannot join

  • 1. Uterine abnormalities as diagnosed by ultrasound 2. Any hormonal or oral contraceptive pretreatment of 3 months preceding the treatment 3. Endometriosis according to American Fertility Society (AFS) ≥3 4. ≥ 2 miscarriages 5. Bologna criteria poor responders (14)

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

United Arab Emirates1 site, 1 recruiting
  • ART Fertility Clinics

    Abu Dhabi, Abu Dhabi Emirate

    Recruiting

Other trials in United Arab Emirates

About this study

Gonal-F® (follitropin alfa) is a recombinant FSH without LH activity, while Menopur® contains both LH and hCG. The MEGASET trial compared Menopur® and Gonal-F® in GnRH antagonist cycles with SET, showing similar efficacy. A subsequent study (MEGASET-HR) in high responders found ongoing pregnancy rates of 35.5% for Menopur® and 30.7% for Gonal-F®, with a lower early pregnancy loss for Menopur® (14.5% vs 25.5%).

Telomere length (TL) in oocyte cumulus cells (CC) correlates with oocyte quality and embryo outcomes. This study aims to assess whether stimulation type (hMG vs. Gonal-F) affects TL in CC and subsequent blastocyst development. A randomized, open-label, cross-over study in normo-responders will analyze telomere length, embryo quality, and hormonal markers.

Read the detailed description

Gonal-F® (follitropin alfa) is a recombinant human follicle-stimulating hormone (rFSH), without LH activity. Urine-derived, human-menopausal-gonadotropin contains LH and hCG. A highly purified hMG, HP-HMG, Menopur® has been compared with Gonal-F® in terms of ongoing pregnancy rate in the so called MEGASET trial ("Menopur in GnRH Antagonist Cycles with Single Embryo Transfer") and both showed to be effective in GnRH antagonist cycles with SET. Another non-inferiority study was initiated in high responders - MEGASET-HR-, comparing Menopur with Gonal-F. After fresh transfer, the ongoing pregnancy rate was similar between groups: 35.5% for Menopur versus 30.7% for Gonal-F, and non-inferiority was established. However, cumulative early pregnancy loss from fresh embryo transfer cycles (ET) and frozen embryo transfer cycles (FETs) in patients treated with HP-hMG was significantly lower as compared to rFSH (14.5% vs 25.5%).

Telomere length (TL) has been long proposed as oocyte quality marker and, recently, has been correlated with pregnancy outcomes. During folliculogenesis, granulosa cells undergo successive cell divisions which can result in telomeric shortening. Telomerase is the enzyme complex that binds the chromosome ends (telomeres) and maintains telomere length and integrity. An association has been shown between telomere length in cumulus cells (CC), oocyte competence and embryo quality. Hence, with the present study, the investigators aim to explore whether the stimulation treatment type (hMG versus Gonal-F) affects the telomere length of oocytes cumulus cells reflecting on subsequent blastocyst development, to help understanding the underlying differences between both gonadotropins.

To the investigators best knowledge, there are no studies evaluating TL in CC from the same patient exposed to two different stimulations. With the present, we intend to perform a randomized, open-label, cross-over study in a selected normo-responders patient population. Patients will be submitted to hormonal analysis, to analysis of telomere length of their oocyte cumulus cells and to analysis of quality markers of its respective embryos/blastocysts. This includes morphokinetics development, euploidy and mitochondria status evaluation of cultured blastocysts.

Keywords
recombinant human follicle-stimulating hormone (rFSH), uman-menopausal-gonadotropin (hMG, ocyte quality, embryo quality, blastocyst development, Menopur, GonalF, GnRH antagonist cycles, trophectoderm, cumulus cells

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

Study groups in NCT06732843
Study groupRoleWhat they receive
Normo-ovarian response patients who undergo an IVF treatment including PGT-APatients will follow the stimulation protocol outlined below: Initial doses will be based on ovarian reserve parameters, with the starting dosage identical for both stimulation cycles (Gonal-F® or hMG): Dose adjustments may be made starting from day 6 Antagonist suppression will be fixed from day 5 onwards Final oocyte maturation will be triggered with a dual trigger: 2,500 IU urinary hCG and 0.3 mg Decapeptyl.

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. In this study the investigators will investigate the telomere length of cumulus cells between two stimulation cycles, using different stimulation medication (rFSH versus hMG) within same patient/woman

    In this study the investigators will investigate the telomere length of cumulus cells between two stimulation cycles, using different stimulation medication (rFSH versus hMG) within same patient/woman

    Measured: 12 weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted13 Dec 2024
  2. Study start23 Jul 2025
  3. Primary completion31 Dec 2026 (estimated)
  4. Study completion31 Jul 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Case crossover
Time perspective
Prospective
Enrolment
10 participants (estimated)
Target duration
60 Months
IDs, dates and publications
ClinicalTrials.gov ID
NCT06732843
Sponsor's protocol ID
2212-ABU-012-DN
Acronym
rFSH and hMG
Status last verified
Jul 2025
First submitted
10 Dec 2024
Last updated
25 Jul 2025
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Undecided

Publications

  • Yu TN, Cheng EH, Tsai HN, Lin PY, Chen CH, Huang CC, Lee TH, Lee MS. Assessment of Telomere Length and Mitochondrial DNA Copy Number in Granulosa Cells as Predictors of Aneuploidy Rate in Young Patients. J Clin Med. 2022 Mar 25;11(7):1824. doi: 10.3390/jcm11071824.

    PubMed 35407431
  • Gardner DK, Schoolcraft WB. Culture and transfer of human blastocysts. Curr Opin Obstet Gynecol. 1999 Jun;11(3):307-11. doi: 10.1097/00001703-199906000-00013.

    PubMed 10369209
  • Younis JS, Ben-Ami M, Ben-Shlomo I. The Bologna criteria for poor ovarian response: a contemporary critical appraisal. J Ovarian Res. 2015 Nov 17;8:76. doi: 10.1186/s13048-015-0204-9.

    PubMed 26577149
  • Haas J, Bassil R, Samara N, Zilberberg E, Mehta C, Orvieto R, Casper RF. GnRH agonist and hCG (dual trigger) versus hCG trigger for final follicular maturation: a double-blinded, randomized controlled study. Hum Reprod. 2020 Jul 1;35(7):1648-1654. doi: 10.1093/humrep/deaa107.

    PubMed 32563188
  • Butts S, Riethman H, Ratcliffe S, Shaunik A, Coutifaris C, Barnhart K. Correlation of telomere length and telomerase activity with occult ovarian insufficiency. J Clin Endocrinol Metab. 2009 Dec;94(12):4835-43. doi: 10.1210/jc.2008-2269. Epub 2009 Oct 28.

    PubMed 19864453
  • Liu JP, Li H. Telomerase in the ovary. Reproduction. 2010 Aug;140(2):215-22. doi: 10.1530/REP-10-0008. Epub 2010 Jun 18.

    PubMed 20562297
  • Fu D, Collins K. Purification of human telomerase complexes identifies factors involved in telomerase biogenesis and telomere length regulation. Mol Cell. 2007 Dec 14;28(5):773-85. doi: 10.1016/j.molcel.2007.09.023.

    PubMed 18082603
  • Riethman H, Ambrosini A, Paul S. Human subtelomere structure and variation. Chromosome Res. 2005;13(5):505-15. doi: 10.1007/s10577-005-0998-1.

    PubMed 16132815
  • Vasilopoulos E, Fragkiadaki P, Kalliora C, Fragou D, Docea AO, Vakonaki E, Tsoukalas D, Calina D, Buga AM, Georgiadis G, Mamoulakis C, Makrigiannakis A, Spandidos DA, Tsatsakis A. The association of female and male infertility with telomere length (Review). Int J Mol Med. 2019 Aug;44(2):375-389. doi: 10.3892/ijmm.2019.4225. Epub 2019 May 31.

    PubMed 31173155
  • Cheng EH, Chen SU, Lee TH, Pai YP, Huang LS, Huang CC, Lee MS. Evaluation of telomere length in cumulus cells as a potential biomarker of oocyte and embryo quality. Hum Reprod. 2013 Apr;28(4):929-36. doi: 10.1093/humrep/det004. Epub 2013 Feb 1.

    PubMed 23377770
  • Kosebent EG, Uysal F, Ozturk S. Telomere length and telomerase activity during folliculogenesis in mammals. J Reprod Dev. 2018 Dec 14;64(6):477-484. doi: 10.1262/jrd.2018-076. Epub 2018 Sep 28.

    PubMed 30270279
  • 5. J. Michaeli, K. Rotshenker Olshinka, N. Srebnik, R. Smoom, N. Serruya, S. Yanai, O. Michaeli, T. Eldar-Geva, Y. Tzfati. Oral communication in ESHRE 2020 preselected for an award: The telomere link between extended fertility and longevity.

  • Witz CA, Daftary GS, Doody KJ, Park JK, Seifu Y, Yankov VI, Heiser PW; Menopur in GnRH Antagonist Cycles with Single Embryo Transfer - High Responder (MEGASET-HR) Trial Group. Randomized, assessor-blinded trial comparing highly purified human menotropin and recombinant follicle-stimulating hormone in high responders undergoing intracytoplasmic sperm injection. Fertil Steril. 2020 Aug;114(2):321-330. doi: 10.1016/j.fertnstert.2020.03.029. Epub 2020 May 13.

    PubMed 32416978
  • Devroey P, Pellicer A, Nyboe Andersen A, Arce JC; Menopur in GnRH Antagonist Cycles with Single Embryo Transfer Trial Group. A randomized assessor-blind trial comparing highly purified hMG and recombinant FSH in a GnRH antagonist cycle with compulsory single-blastocyst transfer. Fertil Steril. 2012 Mar;97(3):561-71. doi: 10.1016/j.fertnstert.2011.12.016. Epub 2012 Jan 13.

    PubMed 22244781
  • van Wely M, Kwan I, Burt AL, Thomas J, Vail A, Van der Veen F, Al-Inany HG. Recombinant versus urinary gonadotrophin for ovarian stimulation in assisted reproductive technology cycles. Cochrane Database Syst Rev. 2011 Feb 16;2011(2):CD005354. doi: 10.1002/14651858.CD005354.pub2.

    PubMed 21328276

Questions about this trial

What is this clinical trial studying?

An observational study of OVARIAN STIMULATION and Telomere Length, run by ART Fertility Clinics LLC at 1 site in United Arab Emirates.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 12 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 25 Jul 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United Arab Emirates. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Daniela Nogueira (971504374961, daniela.nogueira@artfertilityclinics.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

In this study the investigators will investigate the telomere length of cumulus cells between two stimulation cycles, using different stimulation medication (rFSH versus hMG) within same patient/woman (time frame: 12 weeks). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT06732843, which also lists 16 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 25 Jul 2025.

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