Which form of contraception involves an injection lasting several months?

The Depro-Provera injection is a form of contraception that provides effective birth control for several months after a single injection. This method of contraception works by releasing a synthetic form of the hormone progesterone, which helps to prevent ovulation and make it more difficult for sperm to fertilize an egg. The injection is typically administered every three months, making it a convenient long-term option for those who prefer not to take daily pills or manage other forms of birth control.

Oral contraceptives, while effective, require daily administration. The hormonal patch is another form of contraception but involves applying a new patch weekly, not an injection. An IUD, or intrauterine device, is a device inserted into the uterus but does not involve an injection and can provide protection for several years.

In contrast to these methods, the Depro-Provera injection stands out for its ease of use and efficacy over several months with just a single injection.