Zusammenfassung
Das erste Trimenon einer Schwangerschaft ist geprägt von einzigartigen und höchst komplexen Vorgängen, bei denen sich aus einer einzigen Zelle zunächst der Embryo und später der Fetus entwickelt. Da sich die Gewebe und Organe in diesen Wochen rasch differenzieren und somit der Grundstein für eine normale morphologische Entwicklung gelegt wird, ist diese Periode gleichzeitig auch die vulnerabelste Phase der Schwangerschaft. Um eine normale von einer gestörten Entwicklung abgrenzen zu können, ist das Wissen über die Physiologie der embryonalen Entwicklung in der Frühschwangerschaft essenziell. Im Folgenden werden die verschiedenen Phasen der normalen Entwicklung, deren sonographische Meilensteine sowie die sonographische Diagnostik bei Verdacht auf eine gestörte Frühschwangerschaft beschrieben.
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Gottschalk, I. (2014). Ultraschalldiagnostik in der Frühschwangerschaft. In: Gnoth, C., Mallmann, P. (eds) Perikonzeptionelle Frauenheilkunde. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-38023-5_31
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