The Efficacy and Safety of Collagen Scaffold Loaded With Umbilical Cord Derived Mesenchymal Stem Cells in Infertile Women With Thin Endometrium or Endometrial Scarring

After history taking, physical examination, ultrasound examination and hysteroscopy examination，infertile women diagnosed with thin endometrium or endometrial scarring will be included in the clinical trial. A collagen scaffold loaded with UC-MSCs will be transplanted into the uterine cavity during hysteroscopy, and participants will receive hormone replacement therapy before and after the treatment. Postoperative observations including ultrasound examination once a month for 3 times and hysteroscopy in the third month after first UC-MSCs therapy. Those whose endometrium is suitable for pregnancy will be recommended attempting conception actively. The next round of cell therapy will be conducted 3 cycles after the first month if the endometrial growth is unsatisfactory.