The Efficacy and Safety of the Dried Biological Amnion Graft in Patients With Intrauterine Adhesions

Inclusion Criteria: * age 20-40 years； * previously diagnostic hysteroscopy confirmed adhesion score \>5， according to the American Fertility Society （AFS）classification of IUA； * complains of menstruation disorder and reproductive dysfunction； * informed consent. Exclusion Criteria: * premature menopause, * presence of other intrauterine lesions (e.g. polyps, myoma, septa), and * presence of severe intercurrent illness (e.g. systemic disease, coagulative disorders, severe kidney and liver diseases), * adhesions limited to the lower uterine cavity or the cervical canal.