Expanded amnion sign

The expanded amnion sign has been described as a poor prognostic sign in early pregnancy, suspicious though not diagnostic of failed early pregnancy. Any visible embryo that is surrounded by an amnion (visible on transvaginal ultrasound) should also have a heartbeat, regardless of crown-rump length. An absent heartbeat in this context is suspicious for early pregnancy loss.

See also

Ultrasound - obstetric
Share article

Article information

rID: 35585
System: Obstetrics
Section: Signs
Tag: stubs, refs
Synonyms or Alternate Spellings:

Support Radiopaedia and see fewer ads

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.