Prenatal Testing: Amniocentesis Versus Transabdominal Chorionic Villus Sampling (TA CVS)

June 23, 2005 updated by: Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)

Randomized Trial of 11-14 Week Amniocentesis and Transabdominal Chorionic Villus Sampling (TA CVS)

Prenatal diagnosis can provide information to parents about specific fetal disorders. However, invasive prenatal diagnostic procedures are associated with risks to the fetus. This study will compare the safety and effectiveness of two methods of invasive prenatal diagnosis: amniocentesis and transabdominal chorionic villus sampling (TA CVS).

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Amniocentesis is generally performed at 105 to 125 days post last menstrual period (LMP) and TA CVS at 63 to 76 days post LMP. This study will compare the safety and accuracy of transabdominal amniocentesis and TA CVS, each performed during the same modified gestational age window of 77 to 104 days post LMP.

Healthy, pregnant women at 77 to 104 days gestation, whose only indication for prenatal diagnosis is advanced maternal age of at least 34 years at enrollment, will be randomized to receive either TA CVS or amniocentesis following a baseline ultrasound. Eligible women who refuse randomization or for whom a procedure cannot be scheduled by 104 days will also be followed. Primary outcomes include fetal loss or preterm delivery before 196 days gestation as well as total fetal loss, amniotic fluid loss, gestational age at delivery, perinatal morbidity, neonatal morbidity, and congenital abnormalities, including limb reduction defects. Success in obtaining a diagnosis from the two procedures will be compared. One ancillary study will evaluate the feasibility and accuracy of fluorescence in situ hybridization (FISH) as a rapid diagnostic method for certain cytogenetic abnormalities; another will collect data on amniotic fluid alphafetoprotein and acetylcholinesterase for the diagnosis of neural tube defects.

Study Type

Interventional

Enrollment

6400

Phase

  • Not Applicable

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

34 years to 60 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Female

Description

Inclusion Criteria

  • Singleton pregnancy confirmed by baseline ultrasound
  • At least 77 days gestation but not more than 104 days gestation confirmed by baseline ultrasound

Exclusion Criteria

  • Evidence of "vanishing" twin
  • Bleeding equivalent to a menstrual period at any time during this pregnancy
  • Medical history indicating serious maternal illness or potential teratogenic exposure
  • Oligohydramnios
  • Known fetal abnormality
  • Dating inconsistency: if the estimated gestation is 8 or more days less than estimated by LMP, the patient is excluded unless interval growth by ultrasound confirms the normalcy of the pregnancy

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

  • Primary Purpose: Diagnostic
  • Allocation: Randomized
  • Interventional Model: Factorial Assignment
  • Masking: None (Open Label)

Collaborators and Investigators

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

Sponsor

Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)

Investigators

  • Principal Investigator: Laird G. Jackson, M.D., Drexel University College of Medicine

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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

September 1, 1996

Study Completion

August 1, 2000

Study Registration Dates

First Submitted

August 1, 2003

First Submitted That Met QC Criteria

August 4, 2003

First Posted (Estimate)

August 5, 2003

Study Record Updates

Last Update Posted (Estimate)

June 24, 2005

Last Update Submitted That Met QC Criteria

June 23, 2005

Last Verified

June 1, 2003

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • 5R01HD031991 (U.S. NIH Grant/Contract)
  • 1R01HD032109 (U.S. NIH Grant/Contract)

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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