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Ultrasound in the first trimester of pregnancy: basic and further examination

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 trimester fetus.

CME Prakt Fortbild Gynakol Geburtsmed Gynakol Endokrinol 2016; 12(3): 220–231

Ultrasound screening, maternity policy guidelines, first trimester, fetal anomalies, anomaly scan

Christiane Kähler
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 ©akademos Wissenschaftsverlag 2016 ISSN 1614-8533