InfertilityPhase 3MI-PROFNCT05899010
MIcronized PROgesterone in Frozen Embryo Transfer Cycles
A Phase 3 study testing Vaginal progesterone 600mg daily and Vaginal progesterone 800mg daily in people with Infertility, run by Fundación Santiago Dexeus Font at 1 site in Spain.
Trial summary
This randomized trial was designed as non-inferiority trial aiming to compare ongoing pregnancy rates following LPS with 600 mg/day vs 800 mg/day vaginal VMP. All patients will undergo an artificial cycle frozen embryo transfer (AC-FET) with transdermal estradiol 6mg/day Patients undergoing an artificial cycle FET… Read more about this study
- Who is it for?
- Ages 18 to 50 years, women only
- Conditions the study is for
- Infertility
- What is being tested?
- Vaginal progesterone 600mg daily and Vaginal progesterone 800mg daily
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 1,020 participants
- Where
- 1 siteSpain
- Study dates
- 5 Jul 2023to Apr 2028
- Phase
- Phase 3
- 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 50 years
- Women only
- No healthy volunteers
- Adult
Who may be able to join
- Endometrial preparation with hormone replacement therapy
- Age 18-43 years following an autologous IVF cycle (with or without preimplantation genetic testing for aneuploidy)
- Age < 50 years following an egg donation cycle
- BMI > 18 and < 30 kg/m2
- blastocyst embryo transfer
- Willing to participate in the study
Show all 17Show fewer
- Able to come to the Center to comply with the procedures of the study: blood tests, appointments and drug dispensation.
- Exlusion Criteria:
- • Uterine diseases (e.g. submucosal fibroids, polyps, previously diagnosed Müllerian abnormalities)
- Hydrosalpinx
- Recurrent pregnancy loss (≥ 3 previous miscarriages)
- Recurrent implantation failure (≥ 3 previously failed embryo transfers of good-quality blastocysts)
- Allergy to study medication
- Pregnancy or lactation
- Contraindication for hormonal treatment
- Personalized initiation of exogenous progesterone according to a previous endometrial receptivity assay test
- Recent history of severe disease requiring regular treatment (clinically significant concurrent medical condition that could compromise subject safety or interfere with the trial assessment).
Who cannot join
None listed.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Spain1 site, 1 recruiting
- Recruiting
Hospital Universitario Quiron Dexeus
Barcelona, 08028
Nikolaos P Polyzos, MD PhD, 0034932274700, nikpol@dexeus.com
About this study
Official title: A Phase III Randomized Controlled Trial Comparing the Efficacy, Safety and Tolerability of Two Formulations of Vaginal Micronized Progesterone
This randomized trial was designed as non-inferiority trial aiming to compare ongoing pregnancy rates following LPS with 600 mg/day vs 800 mg/day vaginal VMP. All patients will undergo an artificial cycle frozen embryo transfer (AC-FET) with transdermal estradiol 6mg/day Patients undergoing an artificial cycle FET will start estrogen priming with transdermal estradiol 6mg/day (Estrogel®) on cycle D1-D3. Following 10-12 days of estrogen priming, patients will be randomized to luteal phase support with a standard formulation (200mg tid, Utrogestan®) or a new formulation (400mg bid) VMP. All patients will undergo a serum P measurement on the day before embryo transfer (ET). Patients with P<10 ng/ml will receive a supplement of oral micronized progesterone 300mg, while patients with P≥10ng/ml will maintain the previous luteal phase support (LPS) protocol
- Conditions
- Infertility
- Being tested
- Vaginal progesterone 600mg daily, Vaginal progesterone 800mg daily
- Medical subject headings
- Infertility
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Vaginal progesterone 600mg dailyDrug
If endometrial thickness (ETH) ≥7 mm and follicle dominance/ultrasound (US) signs of ovulation P levels are measured: if P ≤1.5 patients start LPS, else cycle is cancelled. If ETH <7mm and no follicle dominance: estradiol dose is increased to 9mg/day and new US is performed up to 4 days after. If persistent thin endometrium after dose increase, cycle is cancelled. 24-48h pre ET, E2 and P are measured. in the morning, pre VMP dose, or at least 6h after last progesterone dose. If progesterone <10ng/ml, additional 300mg daily oral micronized progesterone is administered on the day of the ET and maintained until 10 weeks pregnancy or up to menses or up to negative pregnancy test 10 days after ET. ET will be performed with available blastocysts 6 days after start of LPS. 3-5 days, after ET, a blood test for P measurement will be performed in the morning, before VMP dose, or at least 6h after last progesterone dose. 10 days after ET, the last P test will be done with pregnancy test.
Vaginal progesterone 800mg dailyDrug
If endometrial thickness (ETH) ≥7 mm and follicle dominance/ultrasound (US) signs of ovulation P levels are measured: if P ≤1.5 patients start LPS, else cycle is cancelled. If ETH <7mm and no follicle dominance: estradiol dose is increased to 9mg/day and new US is performed up to 4 days after. If persistent thin endometrium after dose increase, cycle is cancelled. 24-48h pre ET, E2 and P are measured. in the morning, pre VMP dose, or at least 6h after last progesterone dose. If progesterone <10ng/ml, additional 300mg daily oral micronized progesterone is administered on the day of the ET and maintained until 10 weeks pregnancy or up to menses or up to negative pregnancy test 10 days after ET. ET will be performed with available blastocysts 6 days after start of LPS. 3-5 days, after ET, a blood test for P measurement will be performed in the morning, before VMP dose, or at least 6h after last progesterone dose. 10 days after ET, the last P test will be done with pregnancy test.
| Study group | Role | What they receive |
|---|---|---|
| Vaginal progesterone 600mg | Active comparator | Vaginal progesterone 600mg daily (200mg tid) will be started and maintained until 10 weeks of pregnancy or either up to menses or up to negative pregnancy test performed 10 days after ET Receives: Drug: Vaginal progesterone 600mg daily |
| Vaginal progesterone 800mg | Experimental | Vaginal progesterone 800mg daily (400mg bid) will be started and maintained until 10 weeks of pregnancy or either up to menses or up to negative pregnancy test performed 10 days after ET. Receives: Drug: Vaginal progesterone 800mg daily |
What is being measured
The primary outcome is the main question the study is designed to answer.
Ongoing pregnancy rate
A positive heart beat at ultrasound after 11-13 weeks of gestation
Measured: 7-9 weeks after embryo transfer
Secondary outcomes (5)
Implantation rate
Number of gestational sacs over total embryo transfered
Measured: 3-4 weeks after embryo transfer
Biochemical pregnancy rate
positive beta-human chorionic gonadotropin (hCG)
Measured: 10 to 12 days after embryo transfer
Clinical pregnancy rate
A positive heart beat at ultrasound
Measured: 3-4 weeks after embryo transfer
Miscarriage rate
any spontaneous abortion that occurred after confirmation of clinical pregnancy
Measured: before completion of 12 weeks of gestation
Frequency of adverse events
Measured: Until 15 days after the end of treatment with progesterone
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted12 Jun 2023
- Study start5 Jul 2023
- Primary completionJun 2027 (estimated)
- Study completionApr 2028 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (12)Papers the sponsor has linked to this study.
- Other trials for InfertilityStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 3
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 1,020 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Fundación Santiago Dexeus Font
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Nikolaos P Polyzos, MD, PhD, Study chair, Service of Reproductive Medicine Dexeus University HospitalNoemie Sachs-Guedj, MD, Principal investigator, Service of Reproductive Medicine Dexeus University Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05899010
- Sponsor's protocol ID
- FSD-MIC-2022-03
- Other IDs
- 2022-001045-21
- Acronym
- MI-PROF
- Status last verified
- Mar 2026
- First submitted
- 1 Jun 2023
- Last updated
- 30 Mar 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided
Publications
De Geyter C, Calhaz-Jorge C, Kupka MS, Wyns C, Mocanu E, Motrenko T, Scaravelli G, Smeenk J, Vidakovic S, Goossens V; European IVF-monitoring Consortium (EIM) for the European Society of Human Reproduction and Embryology (ESHRE). ART in Europe, 2015: results generated from European registries by ESHRE. Hum Reprod Open. 2020 Feb 24;2020(1):hoz038. doi: 10.1093/hropen/hoz038. eCollection 2020.
PubMed 32123753Devroey P, Polyzos NP, Blockeel C. An OHSS-Free Clinic by segmentation of IVF treatment. Hum Reprod. 2011 Oct;26(10):2593-7. doi: 10.1093/humrep/der251. Epub 2011 Aug 9.
PubMed 21828116Rienzi L, Gracia C, Maggiulli R, LaBarbera AR, Kaser DJ, Ubaldi FM, Vanderpoel S, Racowsky C. Oocyte, embryo and blastocyst cryopreservation in ART: systematic review and meta-analysis comparing slow-freezing versus vitrification to produce evidence for the development of global guidance. Hum Reprod Update. 2017 Mar 1;23(2):139-155. doi: 10.1093/humupd/dmw038.
PubMed 27827818Shi Y, Sun Y, Hao C, Zhang H, Wei D, Zhang Y, Zhu Y, Deng X, Qi X, Li H, Ma X, Ren H, Wang Y, Zhang D, Wang B, Liu F, Wu Q, Wang Z, Bai H, Li Y, Zhou Y, Sun M, Liu H, Li J, Zhang L, Chen X, Zhang S, Sun X, Legro RS, Chen ZJ. Transfer of Fresh versus Frozen Embryos in Ovulatory Women. N Engl J Med. 2018 Jan 11;378(2):126-136. doi: 10.1056/NEJMoa1705334.
PubMed 29320646Wei D, Liu JY, Sun Y, Shi Y, Zhang B, Liu JQ, Tan J, Liang X, Cao Y, Wang Z, Qin Y, Zhao H, Zhou Y, Ren H, Hao G, Ling X, Zhao J, Zhang Y, Qi X, Zhang L, Deng X, Chen X, Zhu Y, Wang X, Tian LF, Lv Q, Ma X, Zhang H, Legro RS, Chen ZJ. Frozen versus fresh single blastocyst transfer in ovulatory women: a multicentre, randomised controlled trial. Lancet. 2019 Mar 30;393(10178):1310-1318. doi: 10.1016/S0140-6736(18)32843-5. Epub 2019 Feb 28.
PubMed 30827784Roque M, Haahr T, Geber S, Esteves SC, Humaidan P. Fresh versus elective frozen embryo transfer in IVF/ICSI cycles: a systematic review and meta-analysis of reproductive outcomes. Hum Reprod Update. 2019 Jan 1;25(1):2-14. doi: 10.1093/humupd/dmy033.
PubMed 30388233Groenewoud ER, Cohlen BJ, Al-Oraiby A, Brinkhuis EA, Broekmans FJ, de Bruin JP, van den Dool G, Fleisher K, Friederich J, Goddijn M, Hoek A, Hoozemans DA, Kaaijk EM, Koks CA, Laven JS, van der Linden PJ, Manger AP, Slappendel E, Spinder T, Kollen BJ, Macklon NS. A randomized controlled, non-inferiority trial of modified natural versus artificial cycle for cryo-thawed embryo transfer. Hum Reprod. 2016 Jul;31(7):1483-92. doi: 10.1093/humrep/dew120. Epub 2016 May 13.
PubMed 27179265Ghobara T, Gelbaya TA, Ayeleke RO. Cycle regimens for frozen-thawed embryo transfer. Cochrane Database Syst Rev. 2017 Jul 5;7(7):CD003414. doi: 10.1002/14651858.CD003414.pub3.
PubMed 28675921Groenewoud ER, Cohlen BJ, Macklon NS. Programming the endometrium for deferred transfer of cryopreserved embryos: hormone replacement versus modified natural cycles. Fertil Steril. 2018 May;109(5):768-774. doi: 10.1016/j.fertnstert.2018.02.135.
PubMed 29778369Vaisbuch E, de Ziegler D, Leong M, Weissman A, Shoham Z. Luteal-phase support in assisted reproduction treatment: real-life practices reported worldwide by an updated website-based survey. Reprod Biomed Online. 2014 Mar;28(3):330-5. doi: 10.1016/j.rbmo.2013.10.022. Epub 2013 Nov 14.
PubMed 24447959Nawroth F, Ludwig M. What is the 'ideal' duration of progesterone supplementation before the transfer of cryopreserved-thawed embryos in estrogen/progesterone replacement protocols? Hum Reprod. 2005 May;20(5):1127-34. doi: 10.1093/humrep/deh762. Epub 2005 Feb 3.
PubMed 15695314Griesinger G, Blockeel C, Sukhikh GT, Patki A, Dhorepatil B, Yang DZ, Chen ZJ, Kahler E, Pexman-Fieth C, Tournaye H. Oral dydrogesterone versus intravaginal micronized progesterone gel for luteal phase support in IVF: a randomized clinical trial. Hum Reprod. 2018 Dec 1;33(12):2212-2221. doi: 10.1093/humrep/dey306.
PubMed 30304457
Study at a glance
From the registry record, last updated by the sponsor on 30 Mar 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Phase III Randomized Controlled Trial Comparing the Efficacy, Safety and Tolerability of Two Formulations of Vaginal Micronized Progesterone
- ClinicalTrials.gov ID
- NCT05899010
- Acronym / sponsor ID
- MI-PROF / FSD-MIC-2022-03
- Conditions
- Infertility
- Phase
- Phase 3
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 1,020 participants (estimated)
- Lead sponsor
- Fundación Santiago Dexeus FontUniversity, hospital or other
- Study start
- 5 Jul 2023 (actual)
- Primary completion
- Jun 2027 (estimated)
- Study completion
- Apr 2028 (estimated)
- First posted
- 12 Jun 2023 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This randomized trial was designed as non-inferiority trial aiming to compare ongoing pregnancy rates following LPS with 600 mg/day vs 800 mg/day vaginal VMP. All patients will undergo an artificial cycle frozen embryo transfer (AC-FET) with transdermal estradiol 6mg/day Patients undergoing an artificial cycle FET will start estrogen priming with transdermal estradiol 6mg/day (Estrogel®) on cycle D1-D3. Following 10-12 days of estrogen priming, patients will be randomized to luteal phase support with a standard formulation (200mg tid, Utrogestan®) or a new formulation (400mg bid) VMP. All patients will undergo a serum P measurement on the day before embryo transfer (ET). Patients with P<10 ng/ml will receive a supplement of oral micronized progesterone 300mg, while patients with P≥10ng/ml will maintain the previous luteal phase support (LPS) protocol
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Vaginal progesterone 600mg | Active comparator | Drug: Vaginal progesterone 600mg dailyVaginal progesterone 600mg daily (200mg tid) will be started and maintained until 10 weeks of pregnancy or either up to menses or up to negative pregnancy test performed 10 days after ET |
| Vaginal progesterone 800mg | Experimental | Drug: Vaginal progesterone 800mg dailyVaginal progesterone 800mg daily (400mg bid) will be started and maintained until 10 weeks of pregnancy or either up to menses or up to negative pregnancy test performed 10 days after ET. |
Who may qualify
- Ages
- 18 to 50 years
- Sex
- Female only
- Healthy volunteers
- Not accepted
- Age groups
- Adult
Key inclusion criteria (17 listed)
- Endometrial preparation with hormone replacement therapy
- Age 18-43 years following an autologous IVF cycle (with or without preimplantation genetic testing for aneuploidy)
- Age < 50 years following an egg donation cycle
- BMI > 18 and < 30 kg/m2
- blastocyst embryo transfer
Key exclusion criteria (0 listed)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Vaginal progesterone 600mg dailyIf endometrial thickness (ETH) ≥7 mm and follicle dominance/ultrasound (US) signs of ovulation P levels are measured: if P ≤1.5 patients start LPS, else cycle is cancelled. If ETH <7mm and no follicle dominance: estradiol dose is increased to 9mg/day and new US is performed up to 4 days after. If persistent thin endometrium after dose increase, cycle is cancelled. 24-48h pre ET, E2 and P are measured. in the morning, pre VMP dose, or at least 6h after last progesterone dose. If progesterone <10ng/ml, additional 300mg daily oral micronized progesterone is administered on the day of the ET and maintained until 10 weeks pregnancy or up to menses or up to negative pregnancy test 10 days after ET. ET will be performed with available blastocysts 6 days after start of LPS. 3-5 days, after ET, a blood test for P measurement will be performed in the morning, before VMP dose, or at least 6h after last progesterone dose. 10 days after ET, the last P test will be done with pregnancy test. | Drug | Vaginal progesterone 600mg |
| Vaginal progesterone 800mg dailyIf endometrial thickness (ETH) ≥7 mm and follicle dominance/ultrasound (US) signs of ovulation P levels are measured: if P ≤1.5 patients start LPS, else cycle is cancelled. If ETH <7mm and no follicle dominance: estradiol dose is increased to 9mg/day and new US is performed up to 4 days after. If persistent thin endometrium after dose increase, cycle is cancelled. 24-48h pre ET, E2 and P are measured. in the morning, pre VMP dose, or at least 6h after last progesterone dose. If progesterone <10ng/ml, additional 300mg daily oral micronized progesterone is administered on the day of the ET and maintained until 10 weeks pregnancy or up to menses or up to negative pregnancy test 10 days after ET. ET will be performed with available blastocysts 6 days after start of LPS. 3-5 days, after ET, a blood test for P measurement will be performed in the morning, before VMP dose, or at least 6h after last progesterone dose. 10 days after ET, the last P test will be done with pregnancy test. | Drug | Vaginal progesterone 800mg |
Primary outcome
Ongoing pregnancy rate
Time frame: 7-9 weeks after embryo transfer
A positive heart beat at ultrasound after 11-13 weeks of gestation
5 secondary outcomes
Implantation rate
Time frame: 3-4 weeks after embryo transfer
Biochemical pregnancy rate
Time frame: 10 to 12 days after embryo transfer
Clinical pregnancy rate
Time frame: 3-4 weeks after embryo transfer
Miscarriage rate
Time frame: before completion of 12 weeks of gestation
Frequency of adverse events
Time frame: Until 15 days after the end of treatment with progesterone
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 30 Mar 2026.
- Background: PubMed 32123753De Geyter C, Calhaz-Jorge C, Kupka MS, Wyns C, Mocanu E, Motrenko T, Scaravelli G, Smeenk J, Vidakovic S, Goossens V; European IVF-monitoring Consortium (EIM) for the European Society of Human Reproduction and Embryology (ESHRE). ART in Europe, 2015: results generated from European registries by ESHRE. Hum Reprod Open. 2020 Feb 24;2020(1):hoz038. doi: 10.1093/hropen/hoz038. eCollection 2020.
- Background: PubMed 21828116Devroey P, Polyzos NP, Blockeel C. An OHSS-Free Clinic by segmentation of IVF treatment. Hum Reprod. 2011 Oct;26(10):2593-7. doi: 10.1093/humrep/der251. Epub 2011 Aug 9.
- Background: PubMed 27827818Rienzi L, Gracia C, Maggiulli R, LaBarbera AR, Kaser DJ, Ubaldi FM, Vanderpoel S, Racowsky C. Oocyte, embryo and blastocyst cryopreservation in ART: systematic review and meta-analysis comparing slow-freezing versus vitrification to produce evidence for the development of global guidance. Hum Reprod Update. 2017 Mar 1;23(2):139-155. doi: 10.1093/humupd/dmw038.
- Background: PubMed 29320646Shi Y, Sun Y, Hao C, Zhang H, Wei D, Zhang Y, Zhu Y, Deng X, Qi X, Li H, Ma X, Ren H, Wang Y, Zhang D, Wang B, Liu F, Wu Q, Wang Z, Bai H, Li Y, Zhou Y, Sun M, Liu H, Li J, Zhang L, Chen X, Zhang S, Sun X, Legro RS, Chen ZJ. Transfer of Fresh versus Frozen Embryos in Ovulatory Women. N Engl J Med. 2018 Jan 11;378(2):126-136. doi: 10.1056/NEJMoa1705334.
- Background: PubMed 30827784Wei D, Liu JY, Sun Y, Shi Y, Zhang B, Liu JQ, Tan J, Liang X, Cao Y, Wang Z, Qin Y, Zhao H, Zhou Y, Ren H, Hao G, Ling X, Zhao J, Zhang Y, Qi X, Zhang L, Deng X, Chen X, Zhu Y, Wang X, Tian LF, Lv Q, Ma X, Zhang H, Legro RS, Chen ZJ. Frozen versus fresh single blastocyst transfer in ovulatory women: a multicentre, randomised controlled trial. Lancet. 2019 Mar 30;393(10178):1310-1318. doi: 10.1016/S0140-6736(18)32843-5. Epub 2019 Feb 28.
- Background: PubMed 30388233Roque M, Haahr T, Geber S, Esteves SC, Humaidan P. Fresh versus elective frozen embryo transfer in IVF/ICSI cycles: a systematic review and meta-analysis of reproductive outcomes. Hum Reprod Update. 2019 Jan 1;25(1):2-14. doi: 10.1093/humupd/dmy033.
- Background: PubMed 27179265Groenewoud ER, Cohlen BJ, Al-Oraiby A, Brinkhuis EA, Broekmans FJ, de Bruin JP, van den Dool G, Fleisher K, Friederich J, Goddijn M, Hoek A, Hoozemans DA, Kaaijk EM, Koks CA, Laven JS, van der Linden PJ, Manger AP, Slappendel E, Spinder T, Kollen BJ, Macklon NS. A randomized controlled, non-inferiority trial of modified natural versus artificial cycle for cryo-thawed embryo transfer. Hum Reprod. 2016 Jul;31(7):1483-92. doi: 10.1093/humrep/dew120. Epub 2016 May 13.
- Background: PubMed 28675921Ghobara T, Gelbaya TA, Ayeleke RO. Cycle regimens for frozen-thawed embryo transfer. Cochrane Database Syst Rev. 2017 Jul 5;7(7):CD003414. doi: 10.1002/14651858.CD003414.pub3.
- Background: PubMed 29778369Groenewoud ER, Cohlen BJ, Macklon NS. Programming the endometrium for deferred transfer of cryopreserved embryos: hormone replacement versus modified natural cycles. Fertil Steril. 2018 May;109(5):768-774. doi: 10.1016/j.fertnstert.2018.02.135.
- Background: PubMed 24447959Vaisbuch E, de Ziegler D, Leong M, Weissman A, Shoham Z. Luteal-phase support in assisted reproduction treatment: real-life practices reported worldwide by an updated website-based survey. Reprod Biomed Online. 2014 Mar;28(3):330-5. doi: 10.1016/j.rbmo.2013.10.022. Epub 2013 Nov 14.
- Background: PubMed 15695314Nawroth F, Ludwig M. What is the 'ideal' duration of progesterone supplementation before the transfer of cryopreserved-thawed embryos in estrogen/progesterone replacement protocols? Hum Reprod. 2005 May;20(5):1127-34. doi: 10.1093/humrep/deh762. Epub 2005 Feb 3.
- Background: PubMed 30304457Griesinger G, Blockeel C, Sukhikh GT, Patki A, Dhorepatil B, Yang DZ, Chen ZJ, Kahler E, Pexman-Fieth C, Tournaye H. Oral dydrogesterone versus intravaginal micronized progesterone gel for luteal phase support in IVF: a randomized clinical trial. Hum Reprod. 2018 Dec 1;33(12):2212-2221. doi: 10.1093/humrep/dey306.
- Related InfoLink provided by the sponsor.
- Individual participant dataSharing planned: Undecided
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Nikolaos P Polyzos, MD, PhD study chair
Service of Reproductive Medicine Dexeus University Hospital
Noemie Sachs-Guedj, MD principal investigator
Service of Reproductive Medicine Dexeus University Hospital
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 3 study testing Vaginal progesterone 600mg daily and Vaginal progesterone 800mg daily in people with Infertility, run by Fundación Santiago Dexeus Font at 1 site in Spain.
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 17 inclusion and 0 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 30 Mar 2026. 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 Spain. 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.
What does this phase mean?
Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
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 Nikolaos P Polyzos, MD, PhD (0034932274700, nikpol@dexeus.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Ongoing pregnancy rate (time frame: 7-9 weeks after embryo transfer). 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 NCT05899010, which also lists 12 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 30 Mar 2026.