3 D TV US: (for legible cases) Examinations are performed using 3 D ultrasound machine, equipped with endocavitary probe at woman health hospital. In all cases will obtain one to three static volumes of the uterus, with a quality ranging from medium to maximum. Initially will visualize the uterus on 2 D ultrasound in a strict mid-sagittal view, adjusting the capture window to obtain the optimal 3 D volume. The volume will then obtained using a sweep angle of 90 degree from one side of the uterus to the other, bisecting the capture plane.