PMC5733213_01
Transvaginal ultrasound showing (a) a cesarean scar ectopic pregnancy with gestational sac and yolk sac in the prior cesarean scar; (b) delineation of ectopic pregnancy and empty endometrial lining; (c) trophoblastic/placental blood flow using color Doppler.
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fig1
During this visit, transvaginal ultrasound showed a CSP measuring 4 weeks and 4 days by mean sac diameter (Figure 1). A yolk sac was also visualized measuring 3.7 mm (Figure 1).