Doxycycline and Progestin Therapy for Chronic Endometritis(CE) in Patients With Recurrent Reproductive Failure(RRF)

A Prospective Randomized Controlled Trial, the goal of this clinical trial is to evaluate the efficacy and safety of doxycycline alone versus doxycycline plus medroxyprogesterone acetate (MPA) in women with chronic endometritis (CE), and to assess subsequent reproductive outcomes. Participants will be randomly assigned to one of two groups and will receive the assigned treatment. Participants will be followed for reproductive outcomes, including pregnancy , ongoing pregnancy, spontaneous miscarriage, and live birth.