Question

what is an advantage of using a hormonal implant?
it is easily inserted in the vagina.
it is a 100 percent effective method of birth control.
it reduces the likelihood of contracting an std.
it can prevent pregnancy for as long as four years.

Explanation:

Hormonal implants are inserted under the skin (not in the vagina). No birth - control method is 100% effective. Hormonal implants do not protect against STDs. Hormonal implants, like the Nexplanon, can prevent pregnancy for up to three to four years.

Answer:

It can prevent pregnancy for as long as four years.