Journal of Medical Ultrasound · 2017 · 13 citations · 8 references
The main finding was that the frequency of live birth in our sample was 62.5% (5 from 8). The clinical inference is that a chorionic bump on first-trimester sonography does not definitely guarantee a secure prediction. The correlation between bump size and pregnancy outcome is not clear, which warrants further research.
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Rick Feld · JAMA · 2012 · 77 citations
Medical Ultrasound, Medical Imaging, Radiology Resident-in-training +12
Transvaginal sonography of the yolk sac in normal and abnormal pregnancy
C. Stampone, M. Nicotra, C. Muttinelli et al. · Journal of Clinical Ultrasound · 1996 · 68 citations
Robert D. Harris, Corey Couto, Clara Karpovsky et al. · Journal of Ultrasound in Medicine · 2006 · 53 citations