European Society for Hysteroscopy classification of intrauterine adhesions

Grade	Extent of intrauterine adhesions
I	Thin or filmy adhesions easily ruptured by hysteroscope sheath alone. Cornual areas normal.
II	Singular filmy adhesions connecting separate parts of the uterine cavity. Visualization of both tubal ostea possible. Cannot be ruptured by hysteroscope sheath.
IIa	Occluding adhesions only in the region of the internal cervical os. Upper uterine cavity normal.
III	Multiple firm adhesions connecting separate parts of the uterine cavity. Unilateral obliteration of ostial areas of the tubes.
IIIa	Extensive scarring of the uterine cavity wall with amenorrhea or hypomenorrhea.
IIIb	Combination of III and IIIa.
IV	Extensive firm adhesions with agglutination of uterine walls. Both tubal ostial areas occluded.

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