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

Pregnancy Clinical Trial

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

Clinical Trial Summary

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).

Clinical Trial 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 Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Factorial Assignment, Masking: Open Label, Primary Purpose: Diagnostic

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT00065897
Study type Interventional
Source Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
Contact
Status Completed
Phase N/A
Start date September 1996
Completion date August 2000
View Details
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