Figure 1.

Cesarean section scar ectopic pregnancy. (a) Sagittal transabdominal image shows gestational sac (∗) in lower uterus inferior to trilaminar endometrium (cursors). (b) Sagittal transvaginal sonogram of gestational sac (∗) within the lower anterior wall and superior to the cervical canal (arrow). Note the marked thinning of the uterine wall adjacent to the sac (arrowheads). (c) Sagittal transvaginal sonogram of yolk sac and embryo (arrow) within the gestational sac (Bl: urinary bladder).