Small gestational sac

Last revised by Alexandra Stanislavsky on 27 Jul 2022

Citation, DOI, disclosures and article data

Citation:

Weerakkody Y, Stanislavsky A, Morgan M, Small gestational sac. Reference article, Radiopaedia.org (Accessed on 24 Apr 2024) https://doi.org/10.53347/rID-30066

DOI:

https://doi.org/10.53347/rID-30066

Permalink:

https://radiopaedia.org/articles/30066

rID:

30066

Article created:

16 Jul 2014, Yuranga Weerakkody ◉

Disclosures:

At the time the article was created Yuranga Weerakkody had no recorded disclosures.

View Yuranga Weerakkody's current disclosures

Last revised:

27 Jul 2022, Alexandra Stanislavsky ◉

Disclosures:

At the time the article was last revised Alexandra Stanislavsky had no recorded disclosures.

View Alexandra Stanislavsky's current disclosures

Revisions:

4 times, by 3 contributors - see full revision history and disclosures

Systems:

Obstetrics

Synonyms:

Small gestational sac size
First trimester oligohydramnios

A small gestational sac in early first trimester is considered a poor prognostic factor. Some authors use the mean sac diameter to crown rump length difference of 5 mm or greater to be normal ¹.

The smaller than expected sac diameter in pregnancies 36-42 days from the last menstrual period has been reported as a predictor of spontaneous miscarriage².

The difference between the two values should not be used in embryos older than 9 weeks ⁵.