Ultrasound in the first trimester of pregnancy: basic and
The first ultrasound screening according to German maternity
policy guidelines includes only minimum standards
for the examination of the fetus in the first trimester.
Special value of this scan is the possibility of an accurate
determination of gestational age and – in case of multiple
pregnancies – chorionicity and amnionicity. The extend of
the examination to detect fetal anomalies is not exactly
defined. Therefore this paper suggests a concept of an
useful screening which enhances the minimum standards.
Aim of this extended examination ist the detection of
signs for fetal anomalies.
An extended anomaly scan is indicated if one of these
signs is positive or if a pregnant women has a high risk for
a fetal anomaly or a developmental defect of the fetus.
This anomaly scan should also be performed prior to a
screening for trisomies (first trimester screening or analysis
of cell-free DNA in maternal blood – NIPT). The contents
of the extended anomaly scan are described.
By this way the multi-level concept of the DEGUM will be
implemented in the sonographic evaluation of the first
CME Prakt Fortbild Gynakol Geburtsmed Gynakol Endokrinol
2016; 12(3): 220–231
Ultrasound screening, maternity policy guidelines,
first trimester, fetal anomalies, anomaly scan
Praxis Dr. Kähler, Erfurt
Reviewer: Isabel Grochla, Köln,
und Boris Tutschek, Zürich, Schweiz
Kähler C. Basis- ... Gynakol Geburtsmed Gynakol Endokrinol 2016; 12(3): 220–231 publiziert 30.11.2016 www.akademos.de/gyn ©akademos Wissenschaftsverlag 2016 ISSN 1614-8533