(A) Trichrome staining was done to visualize collagen (blue) and cells (red). Trichrome stain was performed on endometrial tissue (left panel) and endometrial organoids (Scale bars = 20 μm, right panel). (B) Immunohistochemical staining for ER, AR and PR was done in endometrial tissue (Scale bar = 100 μm bottom panels) and endometrial organoids (Scale bar = 20 μm, top panels). Positive stain is shown in brown and hematoxylin stain solution was added as the counter stain shown in blue. Adapted from Teerawat et al., JCEM, (2019)11.