Women can still get pregnant if they are ligated for the following reasons: Firstly, women are ligated at the isthmus of the fallopian tube, which is relatively easy to do because it is a small part of the fallopian tube. However, ligation does not mean that 100% of the eggs can be prevented from passing through, so even though a woman has been ligated, she can still get pregnant if she still has sex. Secondly, after ligation, the uterine isthmus will temporarily atrophy, because the blood circulation in this area is blocked or the blood circulation is poor, resulting in malnutrition atrophy. In the process of atrophy, the interval between the isthmus of the fallopian tube may be enlarged, and the possibility for the egg to pass through this part will increase, which will provide a better chance for the fertilized egg. Thirdly, tubal ligation is only a blockage at the isthmus, but in reality the egg does not only meet the sperm through the isthmus, i.e. the egg may also pass through other parts of the uterus to meet the sperm, which can also lead to pregnancy.