Ultrasound Amniocentesis

An ultrasound amniocentesis is a procedure in which high frequency sound waves are used to locate the position of your fetus, and a sample of the fluid surrounding the fetus (amniotic fluid) is obtained.

An ultrasound amniocentesis is performed to withdraw amniotic fluid from the uterus to determine maturity of the fetus’ lungs.

Before Your Procedure

  • You may eat normally.
  • No special preparation is required.

During Your Procedure

  • You will be positioned comfortably on your back.
  • Your amniocentesis will be performed by your obstetrician using ultrasound guidance.
  • Pictures of your baby will appear on a video screen and several images and measurements will be recorded.
  • Your lower abdomen will be cleaned with an antiseptic.
  • Using the ultrasound picture as a guide, your doctor will select the safest position to insert a thin needle through your abdomen and into the uterus without hurting your fetus or placenta.
  • Approximately 2 tablespoons of amniotic fluid is withdrawn in a syringe attached to the needle and sent to the lab for testing.
  • Length of the procedure is about 30 minutes.

After Your Procedure

  • You may resume your normal activities unless otherwise directed by your doctor.
  • The lab will send the results to your physician.

Providing safe, quality patient care is our highest priority. To help ensure quality and safety, we ask that you do not bring young children with you to your appointments, as children are not allowed to accompany you during Imaging procedures. Staff is unable to monitor your child in your absence.

If you have any questions or concerns, please contact your provider.

Back to Imaging Patient Instructions

Dear Friends and Neighbors,

CentraCare care givers have been working around the clock for more than 20 months to care for you, your families and friends during COVID. We are committed to caring for every Minnesotan who needs us, and nothing will prevent us from doing so – even during these never-seen-before times.

The challenge of providing this level of care is that our hospital beds are often full. ERs in all of our hospitals are packed. And our clinical teams are exhausted. Early in the pandemic, our community stepped up in amazing ways to help us. We ask that you again join us in fighting this pandemic together.

How can you help?

  • Please get your COVID vaccines and booster shots. They are proven safe and effective in reducing COVID illness, keeping people out of the hospital, and preventing death.
  • If your situation is not an emergency, please use other care options, including:
  • If this is a medical emergency, call 9-1-1, or visit the ER.

Together, we can do this. Thank you for your support.

Ken Holmen, MD
President and CEO