Unintended pregnancies after ligation are usually associated with a failed ligation procedure. If the male or female ligation procedure is successful. The chance of pregnancy after intercourse is very small. The main reason for unwanted pregnancy after ligation is that the ligation surgery is not completely ligated, or the ligation ring is dislodged or the fallopian tube is reopened, which will lead to the combination of sperm and egg, and the fertilized egg enters the uterus to cause pregnancy. This usually has no effect on the development of the fetus, and if there is no abnormality in the examination, the pregnancy can be continued, and you need to go for prenatal checkups on a regular basis. In the case of ligation surgery, medical counseling is required, and if there is a recurrence of the ligation, another ligation can be performed.