How does the implanon change the lining of the uterus? how long after will i be able to have kids?

Use protection: Implanon protects against pregnancy, but not stds so use protection if that is a concern. The drug hormone released makes the uterine lining less friendly for a fertilized egg to implant. The Implanon website is a good one. Read it for further information, but it states you can conceive during the first week after Implanon is removed.