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Clinical Evaluation of the SEQureDx T21 Test In High Risk Pregnancies

This study has been completed.
Information provided by (Responsible Party):
Sequenom, Inc. Identifier:
First received: February 15, 2012
Last updated: April 18, 2016
Last verified: April 2016
Whole blood samples will be collected from high-risk pregnant women to validate the clinical performance of the SEQureDx Trisomy 21 Test.

Down Syndrome
Fetal Aneuploidy

Study Type: Observational
Study Design: Observational Model: Case-Only
Time Perspective: Prospective
Official Title: A Clinical Study to Evaluate the Clinical Performance of the SEQureDx Trisomy 21 Test in the Detection of the Relative Quantity of Chromosome 21 in Circulating Cell-Free DNA Extracted From a Maternal Blood Sample Obtained From Pregnant Women With One or More High Risk Indicators for Fetal Chromosome 21 Aneuploidy

Resource links provided by NLM:

Further study details as provided by Sequenom, Inc.:

Primary Outcome Measures:
  • Clinical Assay Performance [ Time Frame: Performance of the assay will be based upon a single blood sample collected during the only study visit from a high risk pregnancy prior to the subject undergoing an invasive procedure (amniocentesis or CVS) to confirm fetal karyotype. ]
    Each subject will provide a single blood sample prior to undergoing an amniocentesis/CVS that will be processed to plasma and stored frozen until the end of the study. Frozen plasma samples will then be analyzed using the SEQureDx Trisomy Test and the sensitivity and specificity of the assay will be determined by comparing the plasma test results to the fetal karyotyping results obtained via aminiocentesis or CVS. A subject's participation ends after the results of the fetal karyotype are obtained and recorded.

Secondary Outcome Measures:
  • Subject selection bias assessment [ Time Frame: A single blood sample will be collected at a single clinic visit from high risk pregnancies that refuse to undergo an invasive procedure. ]
    All subjects that enter the study are at high risk for fetal aneuploidy. However, sensitivity and specificity of the assay will be based upon those subjects that have a confirmed fetal karyotype obtained by amniocentesis/CVS. Subject selection bias assessment will be done by comparing SEQureDx Trisomy T21 Test results between women who agree to undergo an invasive procedure to obtain fetal karyotype and women who elect not to undergo an invasive procedure.

Biospecimen Retention:   Samples With DNA
Whole blood specimens will be collected and processed to plasma. DNA will be extracted from the plasma.

Enrollment: 3062
Study Start Date: March 2012
Study Completion Date: December 2015
Primary Completion Date: October 2014 (Final data collection date for primary outcome measure)
High risk pregnant subjects undergoing an invasive procedure
Women with one or more high risk factors for fetal chromosome 21 aneuploidy scheduled to undergo an invasive procedure for fetal karyotype determination.
High risk subjects electing not to undergo invasive procedure
Women with one or more high risk factors for fetal chromosome 21 aneuploidy who elect not to undergo an invasive procedure for fetal karyotype determination.


Ages Eligible for Study:   18 Years to 60 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Pregnant women between 10 and 22 weeks of gestation inclusive who have one or more high risk indicators for fetal chromosome 21 aneuploidy.

Inclusion Criteria:

  • Pregnant woman 18 years of age or older at 10 - 22 weeks gestation inclusive
  • Subject has one or more high risk indicator for fetal chromosome 21 aneuploidy
  • Subject provides signed and dated informed consent
  • Subject agrees to provide a whole blood sample

Exclusion Criteria:

  • Fetal demise at the time of the blood draw
  • Previous specimen donation under this protocol
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01555346

  Show 29 Study Locations
Sponsors and Collaborators
Sequenom, Inc.
Study Director: Juan-Sebastian Saldivar, MD Sequenom Laboratories
  More Information

Responsible Party: Sequenom, Inc. Identifier: NCT01555346     History of Changes
Other Study ID Numbers: SQNM-T21-304
Study First Received: February 15, 2012
Last Updated: April 18, 2016

Keywords provided by Sequenom, Inc.:
Down syndrome
fetal aneuploidy
noninvasive prenatal test

Additional relevant MeSH terms:
Down Syndrome
Intellectual Disability
Neurobehavioral Manifestations
Neurologic Manifestations
Nervous System Diseases
Abnormalities, Multiple
Congenital Abnormalities
Chromosome Disorders
Genetic Diseases, Inborn
Chromosome Aberrations
Pathologic Processes processed this record on May 25, 2017