Autologous Bone Marrow-derived Mesenchymal Stem Cells for Atrophic Endometrium in Patients With Repeated IVF Failures

Inclusion Criteria: * Repeated IVF attempts with high and good quality embryo transfer in fresh and frozen IVF cycles; * Age 20-44 years; * Endometrial thickness less than 6 mm in 2 or more of HRT cycles for endometrial preparation for embryo transfer * Hysteroscopic evidence of fibrosis processes of uterine cavity with the absence of positive dynamics of HRT in 3 months following operation; * Signed informed consent. Exclusion Criteria: * Contraindication for pregnancy; * Absence of cryopreserved embryos, stored at clinic's cryobank; * BMI \> 30 kg/m2; * Impaired carbohydrate metabolism according to glucose tolerance test; * Thrombosis in anamnesis; * Oncological diseases in anamnesis; * Diagnosed inherited thrombophilia; * Uterine fibroids of more than 4 cm or more than 2 fibroids of 2.5 cm diameter; * Nodal form of adenomiosis; * Ovarian cysts more than 4 cm in diameter.