Fig. 6From: Incidence, diagnosis and management of tubal and nontubal ectopic pregnancies: a reviewCervical ectopic pregnancy by transvaginal ultrasound. Doppler shows circumferential flow. The arrow indicates Doppler flow inside the gestational sac, associated with the embryo. Such Doppler flow will not be found in a spontaneous abortion, which may slide down into a similar position at the cervixBack to article page