The chances of unwanted pregnancy after ligation are less. Ligation is a sterilization procedure where the fallopian tubes are surgically amputated to prevent sperm and egg from meeting and forming a fertilized egg, thus achieving sterilization. For women with bilateral tubal amputation, the chance of unwanted pregnancy is very small, and this is an insurance sterilization measure. Tubal ligation is mainly applicable to those who do not have the requirement to have children or already have children and do not intend to continue to have children. By ligating the tubes bilaterally and performing the surgery in a standardized manner, the chance of unwanted pregnancy is relatively small.