After the removal of Norplant, your body needs to readjust to its own rhythm. So, it may take several months for regular ovulation and your normal periods to return. Your ovulation and your fertility will probably return even before your regular menstrual bleeding. So there is a chance you will get pregnant even before missing your periods. When you get the typical symptoms of pregnancy such as nausea or breast tenderness, you may want to do a pregnancy test to find out whether you are pregnant or not.