Transabdominal and transvaginal ultrasound demonstrate an abnormally low position of the placenta, covering the anterior lower uterine segment, and also the internal cervical os, in keeping with a major grade placenta previa.
Multiple blood filled spaces are noted throughout the placenta (placental lacunae), a finding associated with abnormal placental adherence.
There is marked thinning of the anterior myometrium, with no appreciable myometrial tissue demonstrated between the placenta and the bladder serosa.
Colour imaging further supports the diagnosis, with marked placental vascularity and increased vascularity of the uterine-bladder interface