Now I know that most pro-life people are like "life starts at conception". So what happens in the event of a miscarriage? so does the woman go to hell for "murdering her baby"? After all if life begins at conception a miscarried fetus DOEs have a soul...
Uhh...murder implies an intentional mental state, in most circumstances, you have to intend to kill to commit murder (of course, some forms of extreme recklessness could also fall into the murder category).
All other issues of this debate aside (ie is a miscarriage a crime, of any sort, for pro-lifers), your premise, on its face is flawed.