Post-ligation recanalization 1. Indications After tubal ligation, the couple should be in good health, the female partner should be under 40 years old, have normal menstruation and conform to the national family planning policy (proof of recanalization is required). There is no contraindication to surgery, and if necessary, corresponding infertility tests should be done, such as semen examination of the male partner, to exclude abnormalities and cure before surgery. 2.Surgery time The operation time is appropriate 3-7 days after menstruation. You can be hospitalized after your menstruation, because you have to prepare for 1-2 days before the operation, such as heart and lung function, blood, vaginal leucorrhoea and cervical smear, etc. There are open tubal revascularization and laparoscopic revascularization. Open tubal reversal surgery is performed under an operating microscope (10-30 times magnification) or a surgical loupe (4-10 times magnification) with the help of fine instruments, which significantly improves the success rate of the surgery. Laparoscopic revascularization has many advantages, but it is difficult and time-consuming to suture the tubal core under laparoscopy using a 7-0 non-absorbable needle and thread (a needle and thread as thick as a human hair). If laparoscopically assisted small incision abdominal tubal revascularization is used, it is ideal (at a higher cost) to achieve the desired revascularization effect and also to treat pelvic endometriosis under laparoscopy, flush out the blood from the abdominal cavity, and perform the Melanoma fluid pass test immediately to verify the effect of revascularization. In order to prevent the surgical wound adhesions, which affect the travel and function of the fallopian tubes, anti-adhesive agents, such as bioprotein gel and hyaluronic acid na, are applied to the surgical wound at the end of surgery. 4.Surgical effect The effect of recanalization after tubal ligation varies according to the original ligation method. The original ligation method uses the isthmus core extraction method or the double fold ligation cut method, where the ligated part is in the middle 1/3 of the fallopian tube, which is convenient for anastomosis. More than 90% of patients have a successful pregnancy within one year after surgery. 5. Pregnancy planning after surgery No contraception is needed after surgery, and pregnancy can occur in the next menstrual cycle. Tubal ligation after the next menstrual cycle has been advocated in the past, but there is an increased risk of pelvic infection. Tubal iodography is even less desirable because contraception is needed for 2 to 3 months after the test. 6. Treatment for post-operative infertility If pregnancy is not achieved one year after surgery, tubal iodography (HSG) or laparoscopy should be performed to clarify the tubal patency. If it is confirmed that the fallopian tubes are incompetent or incompetent bilaterally, assisted reproductive technology such as IVF is feasible.