Along with eggs, I've used previously unopened sour cream WAY (, way) past the date and do the same as you once it's opened. Between the pasteurization of the original milk and then innoculation with good microbes, the lower moisture content and the acidity, it's not a very hospitable environment for pathogens.
Cauterization definition, to burn with a hot iron, electric current, fire, or a caustic, especially for curative purposes; treat with a cautery. See more. Dictionary.com
Tubal ligation is a process where the fallopian tubes are either cut or sealed off so that the eggs cannot reach the womb. A female's equivalent of a vasectomy is having her tubes tided. It is most easily done after giving birth.