CURENDO (Cord-blood Uterine Regeneration Endometrium): Platelet-rich Plasma Therapy Derived From Umbilical Cord Blood for the Treatment of Endometrial Pathologies (Asherman Syndrome / Endometrial Atrophy / Thin Endometrium)

Inclusion Criteria: * age between 18 and 48 years at the time of recruitment * body mass index (BMI): ≥ 18 kg/m2 and ≤ 35 kg/m2 * endometrial thickness \< 5 mm despite estrogen administration according to each clinic's routine practice for 10 or more days and/or evidence of Asherman syndrome. Exclusion Criteria: * Active genital infection at the time of recruitment * chronic endometritis * known endometrial pathology * psychiatric disorder that could hinder study follow-up * positive results on viral safety testing (HBsAg, HBcAb, HCV, HIV-1, HIV-2, syphilis) * presence of any syndrome or condition that, in the opinion of the principal investigator, could pose a risk to the study or to the patient * any clinically significant abnormality detected during the recruitment process * simultaneous participation in another clinical study that could affect the objectives of the present study, or prior participation in this same study.