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Table 2 Classifications of IUA and AS following Valle and Sciarra, 1988

From: Intrauterine adhesions (IUA): has there been progress in understanding and treatment over the last 20 years?

Grade Findings
Mild Filmy adhesion composed of basal endometrium producing partial or complete uterine cavity occlusion
Moderate Fibromuscular adhesions that are characteristically thick, still covered by endometrium that may bleed on division, partially or totally occluding the uterine cavity
Severe Composed of connective tissue with no endometrial lining and likely to bleed upon division, partially or totally occluding the uterine cavity