Fetal Anomaly Screening (FAS) Scan (434)

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Fetal Abnormalities Detection Ultrasound Scan Gestation 18-20 +6 Weeks

A routine fetal anomaly screening appointment scan should be 30 minutes which should include ‘on and off the couch time’ as well as time to complete the report.

The equipment used, should be machines preferably no more than 5 years old
to adhere to the screening programme.

The FAS scan will be completed between 18–20+6 weeks gestation but will be targeted at a gestation of 20 weeks.  This allows time for referral and intervention before 24 weeks if required.

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Editorial Information

Last reviewed: 03/05/2024

Next review date: 18/11/2027

Author(s): Donna-Maria Bean, Julie Murphy.

Version: 4

Approved By: Maternity Clinical Governance Group

Reviewer name(s): Donna-Maria Bean.

Document Id: 434