Clinical Study of Umbilical Cord Mesenchymal Stem Cells Combined With Collagen Scaffold in the Treatment of Thin Endometrium

Inclusion Criteria

• •1. According to the GCP regulations, obtain the informed consent of the subject, volunteer for the test, and have signed the informed consent form.
• •2. Women aged 20-40 years with fertility requirements
• •3. Infertility patients who are treated in this hospital
• •4. After more than 2 times of hysteroscopic adhesion separation surgery, the uterine cavity morphology has basically returned to normal. The patient has a normal menstrual cycle or an estrogenic dose of 6 mg per day, and the highest thickness of the endometrium is 5.5 mm in 6 cycles by ultrasound.
• •5. or receive adjuvant reproductive treatment, the endometrial thickness is less than 5.5mm for unknown reasons, the treatment of estrogen, colony stimulating factor, aspirin, sildenafil and other drugs up to 8mg / day is invalid.
• •6. HBVAg negative, HCV negative, HIV negative, syphilis negative
• •7. Normal bone marrow morphology, normal blood routine
• •8. Previously failed to receive relevant stem cell therapy