The fetus is not an independent human life, even though it has a unique set of DNA that didn't exist before conception and will remain unchanged until the death of the baby if the baby is not aborted -- this is the anti-science part.
Do Pro-Choice people claim that the DNA of the fetus is not unique? Are they claiming that the science showing that a fetus has a unique set of DNA is a "hoax"?
Or do Pro-Choice people acknowledge that the fetus has a unique set of DNA, but disagree that this factor alone defines "independent human life".
In other words, I still think we are boiling down to definitions, unless you have actively heard a Hoax Theory.
[EDIT - here is something I found in a search for pro-choice arguments - it appears to admit that human life begins at conception]
Link: https://www.thoughtco.com/arguments-for-and-against-abortion-3534153