The effect of local suppression of Stat3 activity on sulfated and sialylated uterine glycocalyx. Twenty four hours gene transfection (1 day before implantation began), alcian blue staining with Kernechtrot counterstaining (A–D) and MAM lectin staining with hematoxylin counterstaining (E, F) staining was performed in the uterine tissue with signal transducer and activator of transcription-3 (Stat3) (B, D, F) or scramble (A, C, E) decoy. Lu, lumen; Gl, gland; Ve, blood vessel. Scale bars: (A, B, E, F) 100 μm, (C, D) 50 μm.