Expanded amnion sign

Last revised by Henry Knipe on 4 Jul 2022

Citation, DOI, disclosures and article data

Citation:

Skandhan A, Knipe H, Jones J, et al. Expanded amnion sign. Reference article, Radiopaedia.org (Accessed on 24 Apr 2024) https://doi.org/10.53347/rID-35585

DOI:

https://doi.org/10.53347/rID-35585

Permalink:

https://radiopaedia.org/articles/35585

rID:

35585

Article created:

13 Apr 2015, Avni K P Skandhan

Disclosures:

At the time the article was created Avni K P Skandhan had no recorded disclosures.

View Avni K P Skandhan's current disclosures

Last revised:

4 Jul 2022, Henry Knipe ◉ ◈

Disclosures:

At the time the article was last revised Henry Knipe had the following disclosures:

Radiopaedia Events Pty Ltd, Speaker fees (past)
Integral Diagnostics, Shareholder (ongoing)
Micro-X Ltd, Shareholder (ongoing)

These were assessed during peer review and were determined to not be relevant to the changes that were made.

View Henry Knipe's current disclosures

Revisions:

7 times, by 6 contributors - see full revision history and disclosures

Systems:

Obstetrics

Sections:

Signs

Tags:

stubs, refs, cases, case2

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.