Every embryo has the potential to be implanted, to be destroyed through natural means (failure to implant, miscarriage, genetic defect), and to be destroyed through artificial (discarding, mishandling, trauma, chemical or mechanical abortion through any means).
My reasoning is sound - you're extremely focused on an extremely small number of embryos destroyed because they're done at the mother's discretion, and you feel you should be able to control those because you're powerless against all the others.
And you refuse to acknowledge that there are, among the artificial causes of embryonic and fetal death, much greater offenders that you support because your position is emotional and irrational.