I would like infomation about implatation bleeding. I have researched befor about a year ago for a friend but ican't remember all the facts and I am wondering this time for me. How long after having intercourse can or does implatation bleeding tkae place? I believe it's around 2-3 weeks but I am not sure becuase I also heard it can take 3-5 days after. Also can you have your period, then about 3 weeks later have implatation bleeding, and then miss your period or even have another light period? I have heard that people still can get a regular period because the egg has not attached itself to the uters yet. Any infomation would be gratfully appricated. I am stilkl expecting my period with in these next two days but would like the infomation becuase I had spotting earlier tonight and nothing else and when I stat I always start heavy and never spot. Then again my period could just decided to change on me. Thank you.