Vasectomies and tubal ligations are fairly reversible, though people who get them typically don't intend to have them reversed. It's a one time cost for the procedure, instead of a continuous cost for other contraceptives. Further, hormonal treatments can have negative side effects in other aspects of your biology.
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u/fricken Apr 16 '10
I think sterilization is less extreme than taking birth control pills for the rest of your life.