I have read several studies on emergency contraception, and I have come to the conclusion that Plan B One Step is not an abortifacient. There are even several religious groups who endorse its use because it does not prevent implantation. I would NEVER endorse a product that would prevent implantation or result in dislodgement of an embryo from his or her mother’s endometrium. These products include RU-486 and Ella.
Please see this post on Plan B to understand why I believe this is an important weapon in the war against abortion. Nothing is more important to ending human abortion than preventing an unwanted pregnancy in the first place. Please spend some serious effort researching this important last chance option. It is far better than fighting to save a child from abortion because his or her mother did not have the option of Plan B.