Which of the following is NOT likely to result from retained products of conception?
A. Acoustic shadowing from bony structures within the uterine cavity
B. Heavy bleeding 2 weeks postpartum
C. Pseudosac within the endometrium with a positive urine chorionic gonadotrophin (+UCG)
D. Complex homogeneous mass within endometrium with +UCG
E. Echogenic mass in the cervix with a +UCG