Well, in the context of one man/woman being true to himself/herself, being able to look himself/herself in the mirror in the morning, the question is indeed valid.
Also, it's a decision that each man/woman will have to make for himself/herself, since there is no definitive answer available to mankind.
You can review all manner of scientific data, church opinions, government opinions and even the pictures in Time magazine.
In the end, you will have to decide for yourself what is "right". Surely none of us would deliberately kill a new human life form at its earliest stages?
So, again, each will have to decide for himself/herself.
I've decided that I don't know when "human life" occurs so I'm playing it on the safest side. I know my personal answer and I no longer have to worry about my position on abortion. I know I'm right for me and the guy in the shaving mirror agrees and is content.
YMMV.