Amniotic sac diameter reference interval in early pregnancy between 7 and 10 weeks' gestation.

ABSTRACT:

Objective

To establish a normal reference interval for amniotic sac diameter (ASD) between 7 + 0 and 9 + 6 weeks' gestation and its relative size in relation to gestational sac diameter (GSD) and the embryo crown-rump length (CRL).

Methods

This was a prospective, cross-sectional study of consecutive women presenting to the Early Pregnancy Unit, University College Hospital, London, UK, between August 2022 and June 2023. We included live, normally sited, singleton pregnancies with a normal 20-week anomaly scan. We collected 120 cases per gestational week, from 7 + 0 to 9 + 6 weeks' gestation, totaling 360 cases. We performed an inter- and intraobserver variability assessment in the measurement of mean ASD in 30 patients. Regression analyses were used to establish reference int

SUBMITTER: Solangon SA 

PROVIDER: S-EPMC11610665 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature