Ultrasound images of in situ intrauterine devices: Normal position (A-D) and abnormal position (E-F)

(A) Transabdominal ultrasound shows the normal appearance of the shaft of an intrauterine contraceptive device (IUD) in good position in the endometrial cavity.
(B) Transvaginal scan shows the shaft of the IUD in good position. Note the echogenic string of the IUD in the cervix.
(C) View of the fundus shows the cross bars of the IUD in good position.
(D) Three-dimensional (3D) reconstructed image shows IUD in good position.
(E) In a different patient, transvaginal ultrasound shows low position of IUD, which is located in the cervix.
(F) When an IUD is known to be present, but has not been seen on an ultrasound examination, a KUB is helpful. In this case, the IUD is in the right pelvis (arrow).