But if I say something about embryos that supports them, that's not subjective? You're babbling.
The nature of the embryo is at least as objective as their intent and statements. They can no more make a non-child a child or vice versa through intent or statements than they can make a dog a cat or vice versa through intent or statements.
"The nature of the embryo is at least as objective as their intent and statements."
The embryo, or slightly thereafter is not a person until they announce that it is. Otherwise it is human life only insofar as every other cell in a human organism is. Personhood is a concept, not a biological characteristic. The decision regarding personhood belongs to the parents, until such time that the concept of effective contraception is no longer a valid.