== "Some pro-life groups?" == 

 The intro says, "Some pro-life groups define pregnancy as beginning with fertilization, and consider those forms of EC that act after fertilization to be abortifacients." 

 I don't think that is an accurate paraphrase of the usual pro-life position, and it suggests four questions:  

 1) Why is the word "pregnancy" used here?  Pro-lifers generally say that "human life" (not "pregnancy") begins at fertilization.  The closest pro-life statement that I can recall seeing to "pregnancy begins with fertilization" was a bumper sticker that said, "if it's not a baby / you're not pregnant."  The problem with substituting the word "pregnancy" for the phrase "human life" is that it is unclear how that applies to human embryos conceived in a laboratory. 

 2) Why is the word "define" used instead of "believe" or "contend?"  Words are defined, natural processes can be discovered or understood, but not defined.  The pro-life argument is not about grammar.  

 3) "Some pro-life groups?"  I thought all pro-lifers believed that human life begins at fertilization.  What pro-life groups do not contend that human life begins with fertilization?  Are there any? 

 4) What forms of EC do not act after fertilization? 

 I don't know the answer to question 2, but I am pretty sure that most (if not all) pro-life groups consider human life to begin at fertilization.  Can anyone name an exception? 

 I'm also certain that all forms of EC act after fertilization at least some of the time, and therefore work as abortifacients.  Correct me if I'm wrong.  Does anyone know of a form of EC that doesn't? 

 I suggest that we change the sentence to say, "Pro-life groups contend that human life begins with fertilization, and consider EC to be an abortifacient when it blocks implantation of a fertilized ovum."