When does human life begin?

Yup its another abortion question... this time the huge debate most people have over this

please keep things as civil as possible. if anyone calls anyone names here i will delete your answer or comment. I will keep my opinion to myself for now though some may already know where i fall on this issue...

I'm asking this to see what most think here on this debate
When does human life begin?
Conception (egg fertilization)
When a the heart starts beating
Birth (first breath)
Other moment during pregnancy (say when)
Select gender and age to cast your vote:
When does human life begin?
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