Unit 9 First Trimester Abnormalities
first trimester abnormalitiesanembryonic pregnancyembryonic demisemean sac diametercrown-rump lengthyolk sacgestational sacthreatened abortion
OB/GYN Exam Prep
Unit 9 First Trimester Abnormalities
Identify sonographic markers for first trimester pregnancy failure, including anembryonic pregnancy and embryonic demise. Master critical thresholds for mean sac diameter and crown-rump length to differentiate between viable and non-viable gestations. ARDMS, ARRT, and CCI registry exam preparation.
30:35
Full lesson
Transcript
30:35 lessonAnembryonic pregnancy is suspected when the mean sac diameter reaches 25mm without an embryo. Embryonic demise is confirmed if a 7mm crown-rump length lacks cardiac activity on M-mode.
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