Can someone please reassure me about implanon because a lady told me that apparently her gyno said it takes a month to work and I had mine put in on the 4th day of my period which was nearly two weeks ago. Surely it's working now and the doctor wouldn't have been wrong as she said it works from then but I still wanted to be safe and all the information on it wouldn't be misleading as I had sex yesterday and he didn't cum in me but I'm still just wanting to know the facts on what is happening?!