I think the demarcation between clump of cells and baby human, is more of a religious/spiritual question than anything.

To the best of my knowledge science has not stepped up and provided a firm answer, regarding the large grey area between fertilization and birth.

Mostly thats why I wish the topic would just go away. There isnt a fixed answer, just a bunch of opinions based on spiritual notions.

If there was a fixed, provable answer I would happily support such a position.

For who could be free when every other man's humour might domineer over him? - John Locke (2nd Treatise, sect 57)