SCLife®-UT hUC-MSCs Advanced Therapy Medicinal Products (hUC-MSCs ATMPs) for Patients With Thin Endometrial Infertility

Inclusion criteria

• . Patients aged 20 to 39 years with primary or secondary infertility who have received ivf embryo transfer treatment and have been frozen at least 4 good quality embryos (good quality embryos defined as 7-9C / ⅱ 0 or 4BC or more blastocysts and ≥2 grade ⅰ embryos or 4BC or more blastocysts)
• . Once above 2 times under hysteroscopy surgery adhesions, uterine cavity form has returned to normal, with normal menstrual cycle or at least a cycle high-dose estrogen replacement therapy for more than 12 days (\> 4 mg/day, maximum dose of more than 8 mg/day), after treatment the biggest endometrial thickness of 7 mm or less or upper middle period of endometrial thickness of 7 mm or less on average; Or received assisted reproductive therapy, after at least 4mg/ day of estrogen, colony stimulating factor, aspirin, sildenafil and other drugs, unknown maximum endometrial thickness ≤7mm or average endometrial thickness ≤7mm in middle and upper segment; The maximum endometrial thickness in luteal phase was less than 6mm
• . 18kg/m2\< body mass index (BMI) \<24 kg/m2
• . Voluntarily participate and sign the informed consent