So how long have you been working out those questions? Are you any closer to an answer than you were when you started?
I’m pretty confident in my views on the subject, but it isn’t a very important issue for me.
There is no philosophical middle ground... Either a human being is a person (whose unjustified killing would constitute murder) from conception, or a human being is not a person until it attains higher cognitive function, the capacity for self-motivated action, the ability to communicate, self-awareness, etc.
If one believes the latter, then a human being is not a person until even well after birth. This would not allow killing infants though, as even a human being which is not a person has rights, and those rights would no longer be in conflict with the woman’s (who can give the baby up for adoption).
My logical conception of personhood leans toward the latter, but I’m afraid of the consequences were that view to take hold among people at large. I think the pro-life view is best for society, even if I question its philosophical basis.