Women who have undergone ligation surgery may still get pregnant, and there are two main possibilities for pregnancy in this case.1. Unexpected pregnancy, which is mainly due to the fact that the patient’s ligation surgery was not done thoroughly, or the ligation surgery was done for a very long time, and the ligature line was dislodged, resulting in part of the patient’s tubal lumen being open, and thus an unexpected pregnancy can occur in this case.2. Tubal reversal, which is done after the ligation surgery, is relatively high. In this case, the patient’s chances of getting pregnant again are relatively high. After the tubal recanalization, before the patient gets pregnant again, the patient needs to do a tubal imaging to avoid the patient’s tubal passage but not smooth, and ectopic pregnancy, because once ectopic pregnancy occurs, when it is serious, it may endanger the patient’s life, and ectopic pregnancy will affect the patient’s tubal smoothness, and if the patient carries on the treatment again, the effect will not be very good.