1. Small embryo and yolk sac within an intrauterine gestational sac (A)
Small embryo and yolk sac within an intrauterine gestational sac (A). The 5-mm embryo is positioned along the right side of the yolk sac in this image and cardiac pulsations were visible during real-time sonography. Transvaginal image at 7.5 MHz (courtesy of James Mateer, MD). Embryonic pole is separated from the yolk sac and measures 6 weeks ± 6 days via crown-rump length (B). Transabdominal longitudinal view with empty bladder. (Courtesy of Hennepin County Medical Center)
Source: Chapter 14. First Trimester Pregnancy, Ma and Mateer's Emergency Ultrasound, 3e
Citation: Ma O, Mateer JR, Reardon RF, Joing SA. Ma and Mateer's Emergency Ultrasound, 3e; 2014 Available at: Accessed: October 17, 2017
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