Women who have chronic pelvic inflammatory disease and want to get pregnant, due to chronic pelvic inflammatory disease leads to adhesion and blockage of the fallopian tubes, and ectopic pregnancy occurs after getting pregnant, they can have a tubal lubrication procedure before getting pregnant to detect whether there is blockage of the fallopian tubes. The procedure is very simple, first of all, the doctor dilates the female vagina with a dilator, exposes the cervix, then clamps the anterior lip of the cervix with a cervical clamp for fixation, then the infusion tube enters into the uterine cavity through the opening of the cervix, and then injects saline and Gentamicin and chymotrypsin, and injects it to the point of not being able to withstand it, or stops it when there is particularly high resistance, and determines whether the tubes are clear by judging the resistance.