Fig. 1From: Human mesenchymal stem cell-derived extracellular vesicles/estrogen combined therapy safely ameliorates experimentally induced intrauterine adhesions in a female rat modelTransmission electron microscopy (TEM) of exosomes showing a spheroid double membrane bound morphology (arrows) with a diameter of 40–100 nm (a). Additionally, the exosomes were detected in uterine tissues by PKH26 (b)Back to article page