Fig. 1From: Unresponsive thin endometrium caused by Asherman syndrome treated with umbilical cord mesenchymal stem cells on collagen scaffolds: a pilot studyStudy design and flowchart showing the patient enrollment. A Flowchart showing the study procedure. B Flowchart showing the patient enrollment. CS/UC-MSCs, collagen scaffolds/umbilical cord mesenchymal stem cells; ET, endometrial thickness; ER, endometrial receptivity; FET, frozen–thawed embryo transfer; P0, on the day of starting progesterone-based HRTBack to article page