In The Party of Death, National Review’s Ramesh Ponnuru writes:
We have developed ways of talking that enable us to pretend that the point can be blinked away. In the case of abortion and embryo research, the main technique is to suggest that there is some great mystery about “when life begins,” and that this alleged question is a religious or philosophical one. Yet science has since solved the mystery. From conception onward, what exists is a distinct organism of the human species. The philosophical question is what we make of that fact. To jumble these issues together—the essentially scientific question of categorizing an embryo as human and living, and the moral question of whether it follows from that categorization that it has a right to life—is a logical error. Justice Blackmun, of course, proceeded in just this erroneous fashion in Roe. And if we are not careful, talking in terms of “meaningful life,” or, as [author Ronald] Dworkin does, of “life in earnest,” can lead us into this error as well.
All of us who read this page were once human embryos. The history of our bodies began with the formation of an embryo. We were those embryos, just as we were once fetuses, infants, children, and adolescents. But we were never a sperm cell and an egg cell. (Those cells were genetically and functionally parts of other human beings.) The formation of the embryo marks the beginning of a new human life: a new and complete organism that belongs to the human species. Embryology textbooks say so, with no glimmer of uncertainty or ambiguity.
That new organism is alive rather than dead or inanimate. It is human rather than a member of some other species. It is an organism distinct from all others. It is not a functional part of a larger organism (the way a kidney is part of a larger organism). It maintains its own organic unity over time. It directs its own development, according to its genetic template, through the embryonic, fetal, and subsequent stages. Such terms as “blastocyst,” “newborn,” and “adolescent” denote different stages of development in a being of the same type, not different types of beings. At each of our earlier stages of life, we have been, as we are now, whole living members of the species Homo sapiens. (hardcover, p. 77-78)
Ponnuru is correct. It is simply a fact that, once fertilization has occurred, a living, individual human being exists. Among the well informed, there is no real dispute about these facts, and where issues as serious as life and death are involved, there is no excuse for policymakers or commentators to not be well informed. Here are just a few examples of quotes demonstrating as much (sources linked at bottom of post).
“Zygote. This cell results from the union of an oocyte and a sperm during fertilization. A zygote is the beginning of a new human being (i.e., an embryo).” … “[The zygote] marked the beginning of each of us as a unique individual.” (Keith L. Moore and T.V.N. Persaud, The Developing Human: Clinically Oriented Embryology, 7th ed., Philadelphia: Saunders, 2003, pp. 2,16)
“The zygote thus formed represents the beginning of a new life.” (J.P. Greenhill and E.A. Friedman, Biological Principles and Modern Practice of Obstetrics, Philadelphia: W.B. Sanders, 1974, p. 17)“When fertilization is complete, a unique genetic human entity exists.” (C. Christopher Hook, MD, Mayo Clinic, as quoted by Richard Ostling in an AP news story, 9/24/99)“The beginning of a single human life is from a biological point of view a simple and straightforward matter—the beginning is conception.” (Dr. Watson A. Bowes, University of Colorado Medical School)
“I think we have deluded ourselves into believing that people don’t know that abortion is killing. So any pretense that abortion is not killing is a signal of our ambivalence, a signal that we cannot say yes, it kills a fetus.” (Faye Wattleton, President of Planned Parenthood, 1997 Ms. Magazine interview)“Clinging to a rhetoric about abortion in which there is no life and no death, we entangle our beliefs in a series of self-delusions, fibs and evasions. And we risk becoming precisely what our critics charge us with being: callous, selfish and casually destructive men and women who share a cheapened view of human life…we need to contextualize the fight to defend abortion rights within a moral framework that admits that the death of a fetus is a real death.” (Naomi Wolf, “Our Bodies, Our Souls,” The New Republic, October 16, 1995)
“Whether a being is a member of a given species is something that can be determined scientifically, by an examination of the nature of the chromosomes in the cells of living organisms. In this sense there is no doubt that from the first moments of its existence an embryo conceived from human sperm and eggs is a human being.” (Peter Singer, Practical Ethics, 2nd Edition, Cambridge: Cambridge University Press, 1993, pp. 85-86)
“If I see a case…after twenty weeks, where it frankly is a child to me, I really agonize over it because the potential is so imminently there…On the other hand, I have another position, which I think is superior in the hierarchy of questions, and that is “who owns this child?” It’s got to be the mother.” (Dr. James MacMahon, Abortionist)“When you do a D & C most of the tissue is removed by the Olden forceps or ring clamp and you actually get gross parts of the fetus out. So you can see a miniature person so to speak, and even now I occasionally feel a little peculiar about it because as a physician I’m trained to conserve life and here I am destroying life.” (Dr. Benjamin Kalish, Abortionist)“It [abortion] is a form of killing. You’re ending a life.” (Ron Fitzsimmons, President of the National Coalition of Abortion Providers)“I have never denied that human life begins at conception. If I have a complaint about our society, it’s that we don’t deal with death and dying. Do we believe human beings have a right to make decisions about death and dying? Yes we do, and those decisions are made every day in every hospital.” (Tim Shuck, Clinic Counselor)“We know that it is killing, but the states permit killing under certain circumstances.” (Dr. Neville Sender, founder of Metropolitan Medical Service, an Abortion Clinic in Milwaukee, Wisconsin)
There is much, much more where those came from. The following links contain more than enough evidence to prove the humanity of the unborn to any honest person:
Westchester Institute for Ethics & the Human Person: When Does Life Begin? – Scientific exploration of “two central questions concerning the beginning of life: 1) in the course of sperm-egg interaction, when is a new cell formed that is distinct from either sperm or egg? and 2) is this new cell a new human organism—i.e., a new human being?”
Pro-Life on Campus: When Does Life Begin? – Collection of quotes from respected embryology textbooks and scientists, 1981 Senate testimony & report, and admissions from leading abortion advocates
Princeton Pro-Life: Life Begins at Fertilization – Collection of quotes from respected embryology textbooks and scientists
Eternal Perspective Ministries: Abortion Providers comment on whether abortion is the taking of a life – collection of quotes from abortionists who admit that they end lives
Abort73: Medical Testimony – Collection of quotes from respected embryology textbooks and scientists, and admissions from leading abortion advocates
Abort73: Prenatal Development – Detailed exploration of early fetal development
Abort73: Part of the Mother’s Body? – Explanation of how the preborn human is an individual separate and distinct from the mother’s body
Abort73: Are Sperm and Egg Cells Alive? – Explanation of the difference between a zygote and individual sperm or egg cells
Carnegie Stages of Early Human Embryonic Development – Links to extensive fetal development information
WebMD Pregnancy Center – Comprehensive pregnancy information
Baby2See Fetal Development Guide – Week-by-week fetal development information for expecting mothers
Endowment for Human Development: Prenatal Image Gallery Index – Over 200 images through every stage of development