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DOI: 10.1007/s40556-014-0019-6
The Second Trimester Obstetric Scan (7 + 3 = 10): A Rational Approach (Including the “Rule of Three”)
Authors
Abstract
The second trimester targeted scan is done between 18 and 20 weeks. The primary objective of this scan is to do a detailed anatomical evaluation of the fetus and to maximize the detection of anomalies that may be present at this stage. A systematic method of ultrasound scanning of the fetus will ensure that a reasonably complete examination of the fetus is accomplished. A “rule of three” approach helps in ensuring that no major structures are missed out during the scan. It is a simple “checklist” approach which can be easily remembered. It not only helps in standardized training and performance but also helps in a systematic audit when anomalies are missed.
Publication History
Received: 21 October 2014
Accepted: 24 October 2014
Article published online:
08 May 2023
© 2014. Society of Fetal Medicine. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)
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