Can you assure me that the embryos you select will become implanted?

It is currently not possible to make this assurance. The only thing we can do is select the embryos which are of the best quality from a morphological point of view. If there are enough embryos and if this is recommendable for your specific case, you can opt for long embryo culture (blastocyst culture) or for a pre-implantation test to increase the chances of implantation.