Table 3.

HSG Classification Toaff and Ballas 1978

Classification	Condition
Type 1	Atresia of the internal ostium, without concomitant corporal adhesions
Type 2	Stenosis of internal ostium, causing almost complete occlusion without concomitant corporal adhesions
Type 3	Multiple small adhesions in the internal ostium isthmic region
Type 4	Supra isthmic diaphragm causing complete separation of the main cavity form its lower segment
Type 5	Atresia of the internal ostium with concomitant corporeal adhesions.