Can endomeyrial polyp cause infertility?

Yes. Yes it can. It depends on the size however and exactly where is the location of the polyp within the uterine cavity. There can be inflammation associated with a polyp and the embryo may have more difficult time implanting near that area. A polyp towards the lower end of the uterus is less likely to cause problems with implantation/fertility. Polyp size > or = 1cm increases chance for problems.