The Seasoned Sonographer

Umbilical Artery Doppler & FGR: Understanding Placental Physiology


Listen Later

In this episode we discuss:

  • Definition of FGR (EFW <10% or AC <10%)
  • Early asymmetric FGR and the significance of abdominal circumference
  • Causes of FGR
  • Fetal circulation and placental resistance
  • Proper umbilical artery Doppler technique
  • S/D ratio, PI, RI
  • Absent and reversed end-diastolic flow
  • ACOG-aligned monitoring and delivery principles
  • When sonographers should add UA Dopplers
  • Why UA Dopplers are clinically valid after 24 weeks gestation
  • Referenced guidance:

    American College of Obstetricians and Gynecologists Practice Bulletin on Fetal Growth Restriction

    © 2026 Lynn Flamm, RDMS

    Founder & CEO, Sono Techniques Academy, LLC
    Host, The Seasoned Sonographer Podcast

    For educational purposes only. Clinical management should follow current ACOG guidance and physician direction.

    I’d love to hear your thoughts, questions, or even topics you’d like me to cover—connect with me  @SonoTechniquesAcademy on Facebook facebook.com/profile.php?id=61574057043515  and Instagram instagram.com/sonotechniquesacademy  or send me an email at [email protected].

     

    Disclaimer: The information provided in this podcast and any accompanying materials is for educational and informational purposes only. It is not intended as a substitute for professional medical advice, diagnosis, or treatment. While every effort is made to ensure accuracy, the content is provided “as is” and without warranties of any kind.

    Always seek the guidance of your physician, qualified healthcare provider, or credentialed ultrasound professional with any questions you may have regarding a medical condition, scan interpretation, or clinical decision-making.

    The views and opinions expressed are those of the host and guests and do not necessarily reflect those of any organizations or employers. The host assumes no responsibility or liability for any errors or omissions in the content or for any outcomes related to its use.

    Listeners and participants are solely responsible for how they use the information shared in this podcast or training program.

    ...more
    View all episodesView all episodes
    Download on the App Store

    The Seasoned SonographerBy Lynn Flamm