When you look online, «pregnancy after tubal ligation stories» are all over the place, and it can appear that as an operation, it is not very successful! (checkpregnancy.com)
The 4,000 Sisters of Mercy (who operate the second - largest hospital system in the U.S., after the Veterans Administration) were ordered, under threat of ecclesiastical penalties, to abandon their plan to permit tubal ligations in their hospitals. (religion-online.org)