This is a complete septate uterus.

The two uterine cavities are fairly widely splayed, and it is perhaps for this reason that the uterine configuration was previously named didelphys (on earlier scans, not included here).

Assessment of the serosal fundal contour is key here. There is contiguous myometrium between the two horns (hence not a didelphys), with only a slight dip in the fundal contour (hence not a bicornuate).  The appearance is consistent with a septate uterus, albeit with a fairly thick septum.  Extension into the cervix does

The distinction is important, particularly in a patient with prior miscarriages who is seeking fertility as a septate uterus has the highest association with pregnancy loss. It is also potentially surgically treatable, although given the thickness of the septum in this case it may not be readily amenable to resection.