|

Comparing Chorionic Villus Sampling and Amniocentesis

How The Test Is Done

Chorionic villus sampling

There are two ways of doing chorionic villus sampling. In the transabdominal method, a fine needle is placed through the abdomen to collect placental fragments. In the transcervical procedure, a thin tube (catheter) is inserted into the cervix. The method used depends on the position of the placenta and the doctor's training and expertise. During the procedure, ultrasound guidance is used so that the doctor can see the placenta's position.

CVS can also be done in a multiple pregnancy; in this case both the transabdominal and transcervical methods of collection may be used.

Transabdominal chronic villus sampling

Transabdominal procedure

Transcervical chronic villus sampling

Transcervical procedure

How The Test Is Done

Amniocentesis

During amniocentesis, the doctor uses ultrasound to locate an open pocket of amniotic fluid. Under continued ultrasound guidance, a thin needle is placed through the skin of the abdomen and then through the uterus and into the amniotic fluid. A small amount of the fluid is drawn up into the needle and an attached syringe. A local anesthetic may be applied to your abdomen before the procedure to ease any discomfort.

Chronic villus sampling

excerpted from:

Excerpted from Pregnancy Day by Day.
Copyright © 2009 Dorling Kindersley Limited.
Buy this book now!

Pregnancy Day by Day

Tell us your due date to receive our daily newsletter and find out what is happening in this day of your pregnancy!

Already a member? Log-in here

Name of the Day

stay connected

highlights

The Latest and Greatest Book for Kids
Search our interactive Book Finder for the top new books for kids of all ages, brought to you by the latest book in the I, Funny series, "I Totally Funniest."

Kindergarten Readiness App Wins Gold
Our Kindergarten Readiness app won the Gold Award of Excellence in the educational category at the 2014 Communicator Awards. This valuable checklist comes with games and activities to help your child practice the essential skills she needs for kindergarten. Download the Kindergarten Readiness app today!

Top 10 Wintertime Neighborhood Games
Who says you have to stay inside when the temperature drops? Snowy weather is a great excuse to round up your neighborhood for some outdoor winter fun and games.

2015 Family-Friendly Oscar Nominees
The Oscar nominations are in, and they include several family-friendly movies. See which flicks earned a nod for Best Animated Feature Film and other awards.

© 2000-2015 Pearson Education, Inc. All Rights Reserved.