Paternal Age and Fetal Aneuploidy

December 3, 2025 updated by: Clinique Ovo

Exploring the Association Between Paternal Age and Trisomy 21 Screening Results.

Trisomy 21, commonly known as down syndrome, is the most common chromosomal abnormality in humans. Advanced maternal age (AMA) is a well-recognized risk factor for trisomy 21, with the risk increasing significantly beyond the age of 35. Research on the effects of paternal age on the prenatal risk of trisomy 21 is lacking, with inconsistent findings in the literature.

The Harmony® prenatal test is an Non-Invasive Prenatal Testing (NIPT) that screens maternal blood for chromosomal abnormalities in the Cell-Free Fetal DNA (cfDNA). The harmony® prenatal test can detect conditions such as trisomy 13, 18, and 21, as well as sex chromosome abnormalities.

The Optimo test is a prenatal screening test that screens for trisomies 13, 18 and 21 in the developing fetus using extended biochemical screening in maternal. The Optimo test has shown high sensitivity and specificity in detecting trisomy 21.

Study Overview

Status

Completed

Conditions

Study Type

Observational

Enrollment (Actual)

7141

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

    • Quebec
      • Montreal, Quebec, Canada, H4P 2S4
        • Clinique ovo

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Probability Sample

Study Population

Pregnant women who underwent Optimo trisomy 21 screening at clinique ovo between January 2014 to June 2023

Description

Inclusion Criteria:

  • Pregnant women aged 18 years or older (at the time of trisomy 18 and 21 screening) and who were able to complete the questionnaire in either French or English
  • Pregnant women who completed the entire trisomy 21 screening process at clinique ovo were included

Exclusion Criteria:

  • Patients who did not indicate the male partner/donor's age were excluded
  • Patients who did not complete or sign the clinical information form

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Trisomy 21 screening results
Time Frame: 3 to 5 days
On the day of the Optimo screening test, a questionnaire concerning clinical data (maternal and paternal age, ethnicity, weight, smoking status, pregnancy history) is completed. Blood test and nuchal transparency are done on that day. Results from serum analysis and nuchal transparency are combined to assess the risk of trisomy 21. Association between paternal age and trisomy 21 screening results will be assessed afterwards
3 to 5 days

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Investigators

  • Principal Investigator: Jacques I Kadoch, MD, clinique ovo R&D department

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

July 31, 2023

Primary Completion (Actual)

December 31, 2024

Study Completion (Actual)

June 13, 2025

Study Registration Dates

First Submitted

July 31, 2023

First Submitted That Met QC Criteria

July 31, 2023

First Posted (Actual)

August 8, 2023

Study Record Updates

Last Update Posted (Estimated)

December 9, 2025

Last Update Submitted That Met QC Criteria

December 3, 2025

Last Verified

December 1, 2025

More Information

Terms related to this study

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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