If an unwanted pregnancy occurs after the ligation, the patient can continue the pregnancy if she wants to. Female ligation is mainly to tie the fallopian tubes and male ligation is mainly to tie the vas deferens, the function of these two is mainly to block the channel where the sperm and egg meet, so that the sperm and egg can’t be combined and therefore can play a contraceptive effect. If the ligation fails, the combination of sperm and egg can be conceived without affecting the quality of the fertilized egg, and if the embryo is of normal quality, the patient can continue the pregnancy, but if the ligation fails, the patient’s pregnancy must be ruled out the possibility of ectopic pregnancy, especially if the woman has an unplanned pregnancy after the ligation, she should be highly vigilant. If the patient is pregnant with abdominal pain, bleeding, the uterine cavity can not be found in the gestational sac must be timely examination, because the female tubal ligation tubes will be localized after the tubal insufficiency, so it is particularly vulnerable to ectopic pregnancy. If it is an ectopic pregnancy, the pregnancy can not be continued, and need to be treated conservatively, interventional or surgical treatment according to the situation.