FAQ: Prenatal Diagnostic Tests

What should I do to prepare for an ultrasound?

You will need to be well-hydrated on the day of your exam, regardless of gestational age.

Your bladder will need to be partially filled. This enables adequate visualization of the lower part of your uterus and also services to push the fetus into a better view early in pregnancy.

Drink two 8-unce glasses of non-carbonated fluids 1 hour prior to your scheduled ultrasound.

Please do not empty your bladder prior to the exam. The bladder acts as a “window” to the uterus until the fetus reaches a size where it is easily visible through the abdomen.

If you have young children, please make every effort to find childcare the day of your exam. This allows us to focus on your exam, and allows you to relax and enjoy your time here.

Are CVS and amniocentesis tests safe?

The doctors at the Maternal and Fetal Specialty Center are specialists who have many years of experience with high-risk pregnancies and special procedures. The most recent studies suggest the risk for complications and miscarriage after CVS or amniocentesis is very low. With an experienced doctor, the risks associated with CVS and amniocentesis are similar when you consider the timing of each test.

CVS and amniocentesis tests are typically offered when the test results may have a significant impact on the management of your pregnancy. Your physician and/or genetic counselor can help you weigh all the factors in the decision to have either of these tests.

Will my activities be restricted following CVS or amniocentesis?

After your procedure, you can do most normal activities including walking and driving. However, for the next 24 hours, you should not lift anything heavier than 10 pounds, participate in strenuous activity or exercise, or have sexual intercourse.

When do I receive CVS or amniocentesis results?

Results are usually ready in about two weeks. A genetic counselor will call you to discuss the results. Your doctor will also receive a letter with your results.

Will a normal test guarantee a normal baby?

No. Both CVS and amniocentesis will identify chromosome conditions such as Down syndrome. However, they do not detect other kinds of problems such as cerebral palsy, autism, heart defects and many forms of mental retardation.

How can I learn more about my options?

You can learn more about your options by talking to your doctor and by calling the schedulers at Swedish Maternal and Fetal Specialty Care Center to set up an appointment with a genetic counselor.