Once upon a time the Supreme Court also decided that slaves weren't really "human." That made it OK to kill and dismember them too. The arguments are scarily parallel.
Is the fetus animal, vegetable, or mineral? If animal, the number of chromosomes will tell you what species, 23 pair would lead a reasonable person to conclude it's human.
Liberals would not hesitate to define the alive unborn as human. Their entire agenda is to promote the legal slauughter of these alive humans as a special right to certain females, while continuing to obfuscate the truth that they are extending special right to execute fellow human beings. These same ghouls will decry executing a heinous criminal, claiming it lessens our civilization to execute criminals. That these ghouls care not a whit for the aliveness of the unborn babies must never be spoken of ... kind of like the Wizard who must not be named in the Harry Potter books.