This is a long-acting reversible contraceptive (LARC).
Nexplanon® is the only contraceptive implant on the UK market. From October 2010, it replaced the bio-equivalent Implanon®. It offered an improved insertion device and added barium sulfate to enable location of lost devices on X-ray.
This is a companion discussion topic for the original article at https://patient.info/doctor/progestogen-only-subdermal-implants