The simple answer is no! If you are having vaginal bleeding with clots, it is not implantation bleeding.
Whenever you have blood clots in vaginal bleeding, it often signifies heavy bleeding. Normal periods can contain a kind of clot, called endometrial clot. See blood clots during menstruation.
Implantation bleeding if often so mild that you might notice a pink stain under your underwear or on tissue paper. Or at most very mild vaginal bleeding.
Here again, the answer is no! Do not attribute any vaginal bleeding that is heavy to implantation bleeding. This is important because it is possible for a woman to mislabel an illness causing vaginal bleeding as implantation bleeding which will delay appropriate medical evaluation and treatment.
Therefore implantation bleeding never causes heavy vaginal
bleeding or bleeding with blood clots. If you have any of these, please see
your doctor for appropriate evaluation. Read more about heavy implantation bleeding.
Many women, especially those whe are trying to conceive often seek to know if the bleeding they are having around the expected next period is implantation bleeding or not. It is important to first ascertain whether the bleeding you having is implantation bleeding. See is this implantation bleeding?
Once this initial question is settled, other related confusing issues like heavy implantation bleeding or blood clots will stangely become more apparent.