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(A) Photographs of the used hydrogels and the process of the surgery. A1, Opening the abdomen; A2, scratching the endometrial tissue; A3, placing the 3D printing GelMA/ColMA/hAMSC hydrogel inside the uterus; A4, suturing the uterus. (B) Representative H&E staining images of cavity adhesion in the rat IUA model. The nucleus was blue, while muscle fibers and the cytoplasm were red. (C) Representative Masson staining images of cavity adhesion in the rat IUA model.
