You are nitpicking from the statement in every comment box... try to tie all of your arguments into one long essay, then the statements he gave will make sense to you as it is continuation and not repetitive.
A fetus does not have a 0 percent chance of survival, inaccurate. A fetus will survive as it continues development in the womb and then post birth.
A skin cell does not differentiae into a full human being, a zygote does. And as I've mentioned, it is less cruel to abort a zygote than it is a 9 month old fetus in the womb.
Consciousness doesn't even exist for babies post birth. No one remembers being a one month old. No one remembers any feelings or emotions as one month old. The brain is so under developed, with so little neurons, there is no complex thoughts. A baby at one month old could die without knowing it, or being aware of it. Do you begin abortions post birth because the baby is so young and would not remember or even comprehend being killed? Consciousness isn't any good metric to determine when human life becomes valuable. Human life is human life with or without consciousness.
As he, Oeleo, already said "A person without brain function even under medical equipments are both medically and legally dead, or having no life by any means. Similarly, a zygote that has no brain function are both medically and legally dead or no life at all."
If it were, why would it be a tragedy if someone passed away in their sleep? Why would it be a tragedy if everyone in this world passed away in their sleep tonight? No pain, you won't be aware of it, and you were consciousness for it either. For the same reason why abortion is unethical. You deprive someone the privilege and experience of human life.
We stick with the physiology and not about the consciousness. A person's brain doesn't stop functioning even when he's asleep, therefore he is alive.