Technically it doesn't. Humans are just a certain configuration of field oscillations so any attempt to draw a specific line would be arbitrary. "personhood" in the sense you are talking about is a social construct.

This may clear your continued confusion up on the mattter but I don't hold out much hope on that

personhood

ˈpəːs(ə)nhʊd/Submit

noun

the quality or condition of being an individual person.

"his personhood is more important than his gayness"

https://lozierinstitute.org/a-scientific-view-of-when-life-begins/

This is what pro abortion supporters do to deceive the public & hide the inhumanity of their policies.

1) Steer the abortion conversation to life of mother & rape pregnancies, to Zygotes & first trimester abortions, all to deflect what they really support which is No Restriction abortions of all babies, even viable babies for any reason up to birth. This is the first thing pro choice people do. The GOP has allowed extreme case exceptions since abortion was legalized yet we still hear every day about these extreme rare cases. Lie, deceive, exaggerate, etc. all to condition the electorate to think the GOP wil deny these extreme case abortions.(by the way, rape pregnancies can be prevented within a day or two with a doctor visit)

2) They talk about the medical name of an unborn Baby..... Fetus. By using the name Fetus, they somehow believe it changes the status of the life growing inside the mother. Somehow in their thinking, a Baby that has not yet traveled through the birth canal is somehow different than it is after it is has moved down that canal. WOW, TALK ABOUT DENIAL!

3) They talk about the supposed hard life these unwanted children will have if allowed to live. So in all their God like powers, they know the future of every Baby aborted? How many great people have come from poverty or foster homes, etc.? To be so arrogant to allow the deaths of innocent life because of some perceived hard life is beyond diabolical.

4) Pro choice people like to say they do not personally believe in abortion, but would afford other's the choice to end the lives of their unborn Babies. Gee, how nice of them. I always wonder how a person who personally believes that aborting his own Baby is wrong because it is ending a human life, can support allowing other babies to die. HYPOCRITE PHONEY!

5) After all the scare tactics and deceptions, their next step is to lie and say they do not support late term abortions for any reason. They refuse to accept accountability for supporting all late term abortions of even viable babies every time they vote for Democrats who support it.

6) The Democrat Party and the Left even supports killing viable special needs babies, for any reason up to birth, for merely being different from them. That's like the Nazi mentality where we only want blond haired blue eyed people being born in Germany. In all their arrogance, they will deem who is deservng of life. Where is all their talk about diversity, inclusiveness, compassion? I guess these special olympic children actully mean nothing to them. Their lives are disposable.

I am not here trying to judge any woman who has had an abortion. I'm trying to bring humanity back to our nation by protecting our most innocent vulnerable lives.

Hello N,

In my view the terms personhood and human are not the same. A human is created during contraception. A person is created when the human exits the womb.

excon