"i have had the implant since september 2016 and whilst i acknowledge that it is one of, if not the most reliable methods of contraception, i am shocked at the changes it has imposed on my body. since insertion, i have gained 2 stone with no changes in my diet or exercise and my mental health has been particularly bad. it goes without saying that everyone&#039;s body responds differently to contraceptives, but this has not worked for me."