motley, reconsider your use of the word "probably." Fact is: a human zygote is a living being and therefore a human being when it is "formed by a fertilization event between two gametes" at the moment of conception. The Wikipedia quote is telling: "The zygote’s genome is a combination of the DNA in each gamete, and contains all of the information necessary to form a new individual." Your DNA is in every cell in your body, and that DNA is unique to you — it is the signature that identifies you as an individual, that is: a person like no other in all of history. And that DNA has been with you nonstop since the instant you became alive as a zygote inside your mother. Funk & Wagnalls STANDARD COLLEGE DICTIONARY (1968) defines the word "person" as: "1. Any human being considered as a distinct entity or personality; an individual. … 5. Law - Any human being, corporation, or body politic having legal rights and duties." So the law requires a "person" to have "legal rights" — just only that.