Interventional tubal recanalization (link to video): This is a method to open the blocked fallopian tubes by using catheter, guidewire or pressure under X-ray guidance. In particular, 85% of infertile women who have had abortions, medical abortions, IUDs or induced abortions, or who have had gynecological diseases are caused by obstruction of the fallopian tubes. Female patients with either secondary or primary infertility should be routinely examined for fallopian tubes by means of fluid and imaging. Tubal imaging should be the first reliable method. Fluids, imaging and recanalization should be done between 3 – 7 days after menstruation. The success rate of tubal recanalization procedure is about 95%. If the infertility is simply caused by the fallopian tube, the pregnancy rate is even higher after successful recanalization. Routine blood tests and vaginal discharge examination are performed before surgery. Indications: obstruction of the proximal fallopian tubes (not exceeding the abdomen) caused by chronic inflammation. Contraindications: tubal tuberculosis, post-tubal anastomosis, acute inflammatory phase, bleeding disorders. Contrast agents: iodine water and iodized oil are available. Iodine water should be preferred because of its good fluidity, the presence or absence of diffusion can be seen in 20 minutes, no tubal granuloma will be formed, and no tethering to other areas will occur after reflux.