RCT Study to Validate niPGT-A Clinical Benefit.

Infertility Clinical Trial

— niPGT-A_RCT  

Official title:

Randomized Controlled Clinical Study to Assess the Benefit of Non-invasive PGT-A, by the Analysis of Spent Blastocyst Media, as a Tool for Embryo Prioritization in Infertile Patients Undergoing Assisted Reproduction.

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT04000152
• Other study ID #: IGX1-NIP-CS-18-05
• Status: Recruiting
• Phase: N/A
• Start date: June 29, 2020
• Est. completion date: June 2025

Study information

• Verified date: December 2022
• Source: Igenomix
• Contact: Carlos Gómez, BSc MSc
• Phone: +34 963905310
• Email: carlos.gomez[@]igenomix.com
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Chromosomal aneuploidies are linked with spontaneous miscarriages and abnormal offspring in human pregnancies. In addition, some types of aneuploidies are reported to prevent implantation. Thus, there is a need to identify the embryos with highest implantation potential on in vitro fertilization (IVF) programs.

Since embryo morphology and kinetics have a weak association with embryo ploidy, trophectoderm biopsy plus Next-Generation Sequencing (NGS) is becoming a very popular approach to determine the embryo chromosomal status. This technique is called Preimplantation Genetic Testing for Aneuploidy (PGT-A). Although shown to be efficient, it is invasive for the embryo, requires specific technical skills and it remains expensive. Therefore, the development of a non-invasive, rapid and cheaper method for assessing embryo ploidy status would represent a progress in the field of IVF.

The non-invasive approach has been explored by some groups that analyzed the Spent Blastocyst Medium (SBM) where the embryo was incubated up to the time of transfer or freezing. In daily routine, this media is discarded after finishing the culture of the embryo. Importantly, though, this media reportedly contains traces of embryonic cell-free DNA (cfDNA) that can represent the genetic load of the embryo.

On the basis of that, the hypothesis of this study is that embryo prioritization according to the analysis of the embryonic cfDNA in the SBM could improve ongoing pregnancy rate in 10 percentual points compared to standard blastocyst transfer based on morphology.

Description:

Current Preimplantation Genetic Testing for Aneuploidy (PGT-A) techniques analyze the full chromosome content of a single or few cells with high sensitivity and specificity using Next-Generation Sequencing (NGS). Although shown to be efficient, the technique suffers from some limitations. It requires an embryo biopsy, specific technical skills and it still remains expensive. Therefore, non-invasive techniques for assessing embryo ploidy status are sought as an alternative. Such non-invasive approaches would have various advantages over current strategies, including the elimination of a costly micromanipulation biopsy procedure and the avoidance of risks associated with cell removal. Furthermore, it would be more advantageous, especially for those patients who undergo in vitro fertilization (IVF) treatment but do not have PGT-A indication or they are not willing to have their embryos tested with invasive techniques.

One of the recent advances in the field is the identification of embryonic cell-free DNA (cfDNA) during embryo culture in the lab. It is released to the culture drop (SBM) and represents the chromosome content of the embryo. In a recent pilot study, we analyzed the concordance rates between trophectoderm (TE) biopsy and SBM. In SBM collected on day 6/7 of development, the results were concordant with TE biopsies in 84% of samples, with a false-positive rate of 8.6% and a false-negative rate of 2.5%. These findings are encouraging and were the base for the design of the current RCT study.

The main objective of this study is to evaluate the potential clinical benefits of a new non-invasive method for PGT-A, based on the analysis of the embryonic cfDNA released into SBM.

Considering a dropout rate of around 30% (mainly due to treatment or monitoring failures and no day 6/7 blastocysts to transfer), a total of 1108 participants will be randomized before the ovum pick-up. They will be allocated on a balanced way (1:1 ratio) in one of the two arms: 1) Deferred transfer of a single frozen day 6/7 blastocyst which selection was based on the chromosomal status according to the analysis of the SBM; 2) Deferred transfer of a single frozen day 6/7 blastocyst which selection was based on standard embryo morphology (Gardner criteria). Reproductive outcomes (defined following The International Glossary on Infertility and Fertility Care, 2017) will be compared between the two groups.

As this is an open study, both physician and patient will receive the results of the analysis of the culture media. The control group will also have access to these results but at the end of their participation in the study and if she or her physician request it. Additional tests of chromosomal abnormalities (NIPT and POC) could be performed (with no extra cost) under request to ensure patient´s safety and efficacy of the SBM analysis.

Data exported from the medical records and source documents will be duly codified to protect the clinical and personal information of patients in accordance with the current legislation. This information will be exported to an electronic Case Report Form (eCRF). An interim analysis of this data is planned once 30% of the recruitment has been reached. Besides, the study will be overseen by an independent Data Monitoring Committee after 30% of patients´ recruitment.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 1108
• Est. completion date: June 2025
• Est. primary completion date: February 2025
• Accepts healthy volunteers: No
• Gender: Female
• Age group: 20 Years to 40 Years

Eligibility

Inclusion Criteria:

• Patients whose written informed consent approved by the Ethics Committee (EC) has been obtained, after having been duly informed of the nature of the study and voluntarily accepted to participate after being fully aware of the potential risks, benefits and any discomfort involved.

• IVF patients intending to undergo deferred day 6/7 blastocyst SET for any medical indication.

• All the oocytes/embryos from the cycle should follow the laboratory protocol described in the study (embryo culture and vitrification on day 6/7).

• ICSI, IVF or ICSI/IVF performed in fresh own oocytes from couples not undergoing PGT-A. Note: Donor sperm is allowed.

• Female age: 20-40 years, both included.

Exclusion Criteria:

• Assisted hatching and artificial collapse before collecting SBM samples. Note: Both procedures are allowed only after collecting the culture media sample.

• A known abnormal karyotype if the couple provides it at consultation. If not, karyotype is not compulsory.

• Couples planning to undergo PGT-M or PGT-SR cases will be excluded.

• Surrogate pregnancy (in those countries where it is allowed).

• ERA test and embryo transfer according to ERA result.

• Time-lapse culture systems are not allowed after day 4 of culture.

• Presence of pathologies or malformations that affect the uterine cavity such as polyps, intramural myomas = 4cm or submucosal, septum or hydrosalpinx during the patient's participation in the study. Patients suffering these pathologies before or after their inclusion in the study can participate if the pathology is corrected before performing any study procedure.

• Any illness or medical condition that is unstable or which, according to medical criteria, may put at risk the patient's safety and her compliance in the study.

Related Conditions & MeSH terms

• Aneuploidy
• Chromosome Aberrations
• Chromosome Abnormality
• Chromosome Disorders
• Infertility

Intervention

Diagnostic Test:
• niPGT-A
Two scenarios should be considered according to the results in the SBM analysis: The couple decides to transfer the blastocyst selected according to the SBM result (blastocyst prioritization system). The couple decides to biopsy the blastocysts (if SBM results show low euploidy score). This PGT-A analysis will be offered for free but the outcome of these transfers will be excluded for the analysis per completed protocol. However, all transfers will be included in the intention-to-treat analysis. In the exceptional case of getting a non-informative result for all the SBM analysed, the niPGT-A could be performed again on new SBM samples collected after an additional culture of the embryos for, at least, 8 hours.

Other:
• Morphology criteria
Embryos for transfer will be selected by the only applicable technique, the assessment of morphology according to Gardner´s criteria, which is the most standardized method.

Locations

Country	Name	City	State
Argentina	Crecer: Centro de Reproducción y Genética Humana	Mar Del Plata	Buenos Aires
Argentina	Saresa - Reproducción Humana Asistida	Salta
Brazil	Nilo Frantz - Centro de Reprodução Humana	Boa Vista	Porto Alegre
Brazil	Vida - Centro de Fertilidade	Rio De Janeiro
France	Hôpital Foch	Suresnes
Italy	Società Italiana Studi di Medicina della Riproduzione (S.I.S.M.e.R.)	Bologna
Italy	Centro Procreazione Assistita DEMETRA	Firenze
Italy	Promea S.p.A	Torino
Spain	Eugin Madrid	Madrid
Spain	Hospital Ruber Internacional	Madrid
United States	Boston IVF Fertility Clinic	Boston	Massachusetts

Sponsors (1)

Lead Sponsor	Collaborator
Igenomix

Countries where clinical trial is conducted

United States,  Argentina,  Brazil,  France,  Italy,  Spain, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Non-invasive analysis of the chromosomal status of the embryo	Number and structure of the embryo chromosomes	7 days
Primary	Ongoing pregnancy rate	Number of ongoing pregnancies per single embryo transfer	Over 12 weeks
Secondary	NGS results of the SBM	Informativity rates and prioritization category of the SBM analysis results with embryo development, culture conditions and collection time	7 days at least
Secondary	Non-Invasive Prenatal Testing (NIPT)	Incidence of chromosomal abnormalities in NIPT within ongoing pregnancy cases	Up to 12 weeks
Secondary	Clinical miscarriage rate	Number of clinical miscarriages per total number of ongoing pregnancies	Up to 6 months after the ovum pick-up
Secondary	Analysis of the Products of Conception (POC)	Incidence of chromosomal abnormalities in POC within miscarriage cases	Up to 20 weeks
Secondary	Cumulative ongoing pregnancy rate	Cumulative ongoing pregnancy rate per patient in the 6 months after the pick-up	Over 6 months after the ovum pick-up
Secondary	Time to get an ongoing pregnancy	Time to get an ongoing pregnancy within the 6 months after the pick-up	Up to 6 months after the ovum pick-up
Secondary	Live birth rate	Number of babies born per embryo transfer	Over 40 weeks
Secondary	Cumulative live birth rate	Cumulative live birth rate per patient in the 6 months after the pick-up	Over 6 months after the ovum pick-up
Secondary	Obstetrical outcomes comparison	To compare birth weight, gestational age, APGAR, type of delivery, pregnancy complications, etc.	Over 40 weeks