March et al classified intrauterine adhesions based on the hysteroscopic appearance. The authors are from the University of Southern California in Los Angeles.
Parameters:
(1) percent of uterine cavity involved
(2) type of adhesions
(3) involvement of ostia and upper cavity
Percent of Cavity Involved
Adhesions
Ostia and Upper Cavity
Classification
< 25%
thin or filmy
none or minimal
minimal
25 - 75%
adhesions without agglutination
partial occlusion
moderate
> 75%
thick bands and/or agglutination of walls
complete occlusion
severe
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