What method is described as a permanent prevention of pregnancy?

Sterilization is a method designed for the permanent prevention of pregnancy. This approach involves surgical procedures that effectively block or eliminate the reproductive pathways, making it impossible for sperm to fertilize an egg. Common forms of sterilization include tubal ligation for women and vasectomy for men. These procedures are intended to provide a long-term solution for those who have decided not to have any more children or who do not wish to conceive in the future.

In contrast, the other options listed, such as birth control pills, contraceptive implants, and diaphragms, are all forms of temporary contraception. They require ongoing management, whether through daily medication, regular visits for implant updates, or placement before intercourse, and do not provide a permanent solution to fertility. This distinguishes sterilization as a unique option for individuals seeking lifelong prevention of pregnancy.