Is abortion morally and legally justified?

Welcome to the debate arena! Today's topic: "Is abortion morally and legally justified?". Your opponent's style: future like ours pro life arguer

abortion is ok

You've just asserted a conclusion without any foundation. "Ok" by what standard—legal permission, moral rightness, or personal preference? Those are three different claims requiring three different arguments. Which one are you actually defending?

moral rightness but i wanna hear your justification first

Here's the hard truth: a genetically human organism with its own DNA and heartbeat exists from conception. If it's not a person deserving protection, you need a criterion that doesn't arbitrarily exclude it. What makes personhood begin, and why?

i only value life that is part of the conjunct of being human and having a capacity for sentience

You've smuggled in "capacity" to dodge the problem. A sleeping person has no sentience right now, yet you'd call killing them murder. Why does potential sentience matter for a fetus but not for temporarily unconscious humans?

i said capacity for sentience meaning ability for sentience which develops with thalamocortical connections at weeks 20-24. a sleeping person has the capacity for sentience

You're arbitrarily choosing week 20-24 when thalamocortical connections begin forming incrementally much earlier. Why is that specific threshold the moral line instead of conception, implantation, or cardiac activity? What's special about that week that wasn't true the week before?