Diagnosis of Chronic Endometritis in Endometrial Fluid Using Molecular Techniques to Improve the Outcomes of Assisted Reproductive Treatments

"On day 5 of the Hormonal Replacement Therapy (after 5 days of progesterone administration), the doctor will perform endometrial fluid aspiration (EF) followed by an endometrial biopsy (EB) the same day of hysteroscopy that is performed as usual clinical practice. EF sample will be analyzed by molecular techniques (Next Generation Sequencing) for the detection of infectious agents and the EB sample will be divided into three parts, one of them will be used for molecular analysis (as control of the bacterial content present in the EF) and the others will be used for microbiological analysis and histological techniques respectively.~The Assisted Reproductive Treatment (ART) will be performed once the specialist considers it appropriated according to the clinical standard practice and the reproductive rates will be correlated with the diagnosis of CE comparing the results of ART before and after its diagnosis of CE."