Fertility Outcomes After Antibiotic Treatment In Women With Chronic Endometritis

Inclusion Criteria * Female participants aged 18-40 years. * Diagnosis of infertility (primary or secondary infertility). * Indication for diagnostic hysteroscopy with endometrial biopsy as part of infertility evaluation. * Suspected or confirmed chronic endometritis. * Ability and willingness to provide written informed consent prior to any study-related procedures. * Willingness to undergo protocol-defined antibiotic treatment. * Willingness to comply with study procedures and follow-up assessments. * Agreement to reproductive outcome monitoring following treatment, including spontaneous conception and pregnancies achieved through assisted reproductive technologies (ART). Exclusion Criteria * Age \>40 years. * Current pregnancy. * Known hypersensitivity or contraindication to tetracycline antibiotics or other study-related antibiotic therapy without a suitable alternative treatment option. * Severe systemic disease or medical condition that, in the opinion of the investigator, could interfere with study participation, safety, or interpretation of study results. * Active malignant disease requiring systemic treatment. * HIV infection or other severe immunodeficiency disorder. * Acute pelvic inflammatory disease or clinically significant active genital tract infection requiring immediate treatment. * Previous participation in this study. * Inability to undergo planned hysteroscopy or endometrial biopsy. * Inability or unwillingness to comply with study procedures or follow-up requirements. * Failure or refusal to provide written informed consent.