Clinical Safety Study of Human Embryonic Stem Cell Derived Mesenchymal Cells in the Treatment of Moderate and Severe Intrauterine Adhesions

Criteria: Inclusion Criteria: * 18 ≤ age ≤38, female; * According to the 1988 American Fertility Society (AFS) diagnostic criteria, patients with uterine adhesions diagnosed with full civil capacity and with a score of ≥5 were enrolled in the study; * The patient had one or more of the following clinical symptoms: reduced menstruation or amenorrhea, periodic abdominal pain, secondary infertility, recurrent abortion, premature delivery and other adverse pregnancy outcomes; * The uterus was smaller than 8 weeks gestation and the uterine cavity depth was less than 12 cm; * The second to fifth day of menstruation FSH \<10mIU/mL, AMH \>1.2ng/mL, AFC\>6; * Understand and sign informed consent voluntarily. Exclusion Criteria: * Patients with acute pelvic inflammation or endometriosis; * Having or having a history of malignancy; * Thrombus, lupus erythematosus and other hormone use contraindications; Allergic to albumin products; * Patients with uterine malformation, adenomyosis, submucosal uterine fibroids,and uterine fibroids of any site \>5cm; * Patients who were using anticoagulants or who had not recovered normal platelet function 10 days after discontinuation of antiplatelet drugs; * Previous history of abnormal coagulation function or abnormality before cell transplantation; * Always has a history of abnormal bleeding (such as abnormal bleeding during tooth extraction), or their immediate family members have hemorrhagic disease,such as hemophilia, bleeding symptoms (e.g., …