One for all the philosophical minds to debate. There is an upcoming pro choice march coming up tommorrow, so in wake of that when does personhood begin, or more simply when does life become a person? Wikipedia has a very good debate on the issue and overview and insight into the situation.
Personally Im a fan of the theories of Ann Warren who was a famous philosopher . Her idea was that :
A child is not capable of this until twenty weeks at least with very little in the way of concious thought.Mary Ann Warren suggests consciousness (at least the capacity to feel pain), reasoning, self-motivation, the ability to communicate, and self-awareness.