Can you supply "objective verifiable fact" that you are more human than an infant emerging through its mother's birth canal?
HUMAN-NESS IS NOT THE ISSUE. Only personhood matters. Personhood is a totally different and unrelated concept, from "human-ness" --and that statement is extremely-easily proved to be valid. I remind you of a human
hydatidiform mole, which originates in an ovum-conception event, just like an ordinary human embryo, and is both 100% alive and 100% human, but not even the most vehement of abortion opponents will insist that just because it is human, a hydatidiform mole qualifies as a person and deserves rights. (And the other side of the proof-coin is the presumed existence of non-human persons --It's A Big Universe Out There-- which some folks already insist includes
dolphins.)
For even more proof, look at a brain-dead adult human on full life-support. When the diagnosis of brain death is confirmed, no mistake possible,
at that time a Formal Death Certificate is filled out. Remember, though, that the whole rest of that human body is still alive! Nevertheless, the scientists and the doctors and even the lawyers all agree that when the brain dies, the person dies --
and the living human body doesn't matter in the slightest; it has nothing whatever to do with the concept of personhood. Well, an unborn human certainly has a human body, and some number of weeks after conception it begins to have a brain, also, but the brain is not the only thing that qualifies an entity as a person. Otherwise
many ordinary
animals would be declared to be persons, too! Personhood is associated with a particular
quality of brainpower that dolphins can appear to match, that we expect in the future True Artificial Intelligences to match, that we expect various as-yet-unencountered extraterrestrial entities to be able to match, but which most ordinary animals measurably cannot match, and which unborn humans, with absolute certainty, also cannot match.
IN CASE YOU ARE WONDERING WHY ONLY PERSONHOOD MATTERS, see the Constitution. It and its Amendments use the word "person" throughout, and don't use the word "human" even once. Thus those documents are about "person rights", not "human rights"!