Under your definition a woman taking a birth control pill would be a "killer." Since sperm has many of the parts of your "blueprint," would a masturbater be a "half-killer."
What is a "Constitutionally protected person?" Would that be like a mentally ill person, who is ruled incompetent to make their own legal decisions? Or like a "brain dead," patient, unable to sustain life on their own, or have the mental acuity necessary to make life and death decisions. Courts have ruled thousands of times that their rights as a "person," can be suspended. Your conceived mass of goo never had a consciousness to be adjudicated. They are at least three iterations away from being what might resemble a person.
