I got voluntarily sterilized years ago. Most of them think I had a problem with a cyst on my Fallopian tube (true) but they didn't know that removing them entirely was elective to remove the cyst AND the chance of pregnancy. Kind of awkward sometimes with the "you never know!" and "God works miracles!" talks that their Catholic vantage point tells me (more themselves, really) when I say that I won't be having kids