Autologous Intrauterine Platelet-Rich Plasma Instillation And Endometrial Scratching for Thinned Endometrium

Inclusion Criteria: Endometrial thickness \< 7 mm under estrogen replacement therapy or repeated implantation failure Age between 18 and 38years Exclusion Criteria: Age \< 18 and \> 46 years Pregnancy Bleeding diathesis Previous uterine surgery (miomectomy, cesarean section, etc...) Platelet count \< 105/μL Hemoglobin \< 10 g/dL Presence of a tumor in the wound bed or metastatic disease Current diagnosis of cancer Other concomitant active infections Other factors of infertility ( PCO, tubal block, congenital anomalies, genetic malformation, male infertility)