Ultrasound localisation of non-palpable Implanon.

Background: Localisation of the non-palpable Implanon is useful to confirm its presence or to assist the surgeon with its removal. Previous studies have suggested that almost all non-palpable Implanon implants can be located with ultrasound in phantoms.

Aim: To determine whether diagnostic ultrasound is a reliable method for localising non-palpable Implanon implant in-vivo.