The Unborn

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Bioethics Today
Ethics for the 21st century


The Fetus Is Not a Parasite: Debunking an Ethical Fallacy
Abortion, Ethics February 26, 2013 Comments: 15
There is a pro-choice argument that attempts to use ethics to prove that the mother has a right to kill the fetus, even though it is a living person, because it is a parasite that steals nutrients from the mother. Because of this parasitic relationship, the argument goes, killing the fetus is self-defense rather than murder.1

The first problem with this argument is that it is biologically inaccurate on many different levels.2 Parasites are labelled parasitic animals whether they are in a parasitic stage of their life cycle or not. If the fetus is a parasite, then every adult mammal, whether it be a human or an elephant, is also a parasite. If this is so, then the term has been so stripped of meaning as to be useless.

Obviously then, the fetus is not a parasite by any truly scientific definition. Instead, when people call the fetus a parasite they are using the popular layman’s definition of the word. This article is a response to the ethical arguments that have been developed using this definition. The author assumes in this article that the fetus is a human being and a person. Doing so is appropriate in this instance as the argument being rebutted claims to provide justification for abortion despite the personhood of the fetus.

The fetus has no moral guilt.

The fetus did not intentionally enter a woman’s womb, and in most cases its presence there is actually a result of the woman’s decisions. The pro-choice person will say that this does not matter, as bodily violation is not necessarily intentional.

This is true, but it does not mean that the intentions of the violating party are irrelevant. There is an undeniable difference in the moral guilt of someone who has accidentally brushed their hand against another person and someone who has purposefully groped another person. In both cases the person violated has a right to put a stop to the action. He or she may resort to force, even lethal force, to prevent someone from groping them. However, it would be wholly inappropriate to use the same force against a person who has accidentally brushed up against them. That person has not intentionally done any harm and does not deserve such treatment.

Similarly, the fetus has not intentionally invaded the body of a woman. Using lethal action against it, therefore, is an immoral act and the taking of an innocent life.

There is a moral obligation to sacrifice to preserve innocent life.

There are a host of analogies used to argue that humans do not have an obligation to preserve innocent life at the expense of their quality of life. Perhaps the most well-known is the “famous violinist” analogy created by Judith Jarvis Thompson:

You wake up in the morning and find yourself back to back in bed with an unconscious violinist. A famous unconscious violinist. He has been found to have a fatal kidney ailment, and the Society of Music Lovers has canvassed all the available medical records and found that you alone have the right blood type to help. They have therefore kidnapped you, and last night the violinist’s circulatory system was plugged into yours, so that your kidneys can be used to extract poisons from his blood as well as your own. [If he is unplugged now he will die, but he can be safely unplugged in nine months.] Is it morally incumbent on you to accede to this situation? No doubt it would be very nice of you if you did, a great kindness. But do you have to accede to it?3

The first major problem with this analogy is that it implies rape. The fetal parasite argument seeks to prove that abortion is permissible in all situations, so creating a situation that resembles rape in a supporting analogy is intellectually dishonest. This alone is reason enough for us to discard the analogy, as the scenario is a slanted representation of the moral dynamic. For the sake of discussion, however, we shall further dissect Thompson’s analogy.

We must first establish the crux of this contention, that life is valuable. We can do this using assumptions made by the pro-choice side to avoid a debate on the point. If abortion is necessary, as they claim, to ensure quality of life for women, we may infer that life has some value. Because they claim that government has no right to interfere with their reproductive decisions (and, thus, their quality of life), we may also infer that they believe their quality of life to have value that exceeds governmental law. God, divine law, higher law, natural law, morality, ethics—whatever one chooses to call it, the pro-choice community indirectly references it when placing value upon life.

There are very few situations that mentally healthy people regard as being worse than death, and some hold that no such situations exist. Quality of life is clearly secondary to life itself, and to say that one’s right to a certain quality of life trumps another person’s right to life itself is fallacious. If such ethics were to be implemented into law it would be legal to murder someone for their possessions.

Some would reply that although keeping the unborn child alive may be the moral thing to do, compelling someone to do the right thing is illegal. This is untrue in many cases, but proving it to be untrue falls outside the scope of this post. Instead, I shall simply explain why statements like the one below are irrelevant.

We are never legally required to sacrifice our bodies to save other people’s lives in any other circumstances. We aren’t even required to do so for our own children after they are born. I would be legally within my rights to deny a kidney, or even my blood, to my child, even immediately after birth. But for some reason people still insist that I should be required to carry the thing around for nine months inside my body. The inconsistency here is unfathomable. My right to bodily autonomy is not changed by the fact that I happen to be pregnant.4

Using governmental law as a framework for the debate is pointless. Regardless of whether the government has a right to compel a person to preserve child’s life, that person has a moral obligation to do so. Add to this that we have already established that life has value that is of a higher origin than human law and this argument becomes laughable.

Morality may not be disregarded in this debate.

There are several analogies that are used to argue that morality may be ignored. An example of one of these reads, “It would be nice for me to donate half of my money to charity, but most people understand that that would leave me financially crippled and and would understand if I did not. Similarly, it would be nice for me to keep the fetus alive but people should understand if I choose not to.” This analogy is highly flawed. While it is acceptable to use a loose analogy to illustrate a point, a hypothetical should resemble its real-life counterpart as closely as possible when it is being used as an ethical argument.

A better analogy for the situation would read something like this: You live in a prison cell by yourself with enough food supplied to you daily to keep you alive and healthy. One day, a young child is placed in your cell with you. The amount of food you receive is increased from that point forward so that you have enough for yourself and the child. In this situation, would it be morally right to kill the child for eating superfluous food and being your unwilling roommate? This analogy is better for the following reasons:

  1. It involves a specific human child rather than an ambiguous people group (those benefiting from the charity).
  2. The child will either live or die depending on your choice. The beneficiaries of a charity will most likely not die because one person did not give a contribution, and this lack of seriousness is implicit in the illustration.
  3. The child in this example is unwillingly placed in a situation of dependence. The beneficiaries of charity in the other example are not.
When presented with this analogy, which is far more precise, most would say that it is immoral to kill the child. Also, using the term nice is a red herring fallacy. What is at question here is not what is nice but what is moral. While it may be “nice” of you to donate half of your money to charity, it would not be immoral for you to save your money.

Trying to create a workaround of morality in this debate is intellectually dishonest, as the entire purpose of the argument is to prove that it is not immoral to kill the fetus.

Conclusion

We may perhaps debate the ethics of forcing someone to do the right thing, but what is evident is that abortion is not moral, regardless of its legal status. Members of society must hold themselves accountable to the higher law of morality, even when human law would indicate that doing otherwise is permissible.


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Why the Embryo or Fetus Is Not
a Parasite



by Thomas L. Johnson
Libertarians for Life
Copyright © 1974, Thomas L. Johnson

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  1. a) A parasite is defined as an organism of one species living in or on an organism of another species (a heterospecific relationship) and deriving its nourishment from the host (is metabolically dependent on the host). (See Cheng, T.C., General Parasitology, p. 7, 1973.)
    b) A human embryo or fetus is an organism of one species (Homo sapiens) living in the uterine cavity of an organism of the same species (Homo sapiens) and deriving its nourishment from the mother (is metabolically dependent on the mother). This homospecific relationship is an obligatory dependent relationship, but not a parasitic relationship.

  2. a) A parasite is an invading organism -- coming to parasitize the host from an outside source.
    b) A human embryo or fetus is formed from a fertilized egg -- the egg coming from an inside source, being formed in the ovary of the mother from where it moves into the oviduct where it may be fertilized to form the zygote -- the first cell of the new human being.

  3. a) A parasite is generally harmful to some degree to the host that is harboring the parasite.
    b) A human embryo or fetus developing in the uterine cavity does not usually cause harm to the mother, although it may if proper nutrition and care is not maintained by the mother.

  4. a) A parasite makes direct contact with the host's tissues, often holding on by either mouth parts, hooks or suckers to the tissues involved (intestinal lining, lungs, connective tissue, etc.).
    b) A human embryo or fetus makes direct contact with the uterine lining of the mother for only a short period of time. It soon becomes isolated inside its own amniotic sac, and from that point on makes indirect contact with the mother only by way of the umbilical cord and placenta.

  5. a) When a parasite invades host tissue, the host tissue will sometimes respond by forming a capsule (of connective tissue) to surround the parasite and cut it off from other surrounding tissue (examples would be Paragonimus westermani, lung fluke, or Oncocerca volvulus, a nematode worm causing cutaneous filariasis in the human).
    b) When the human embryo or fetus attaches to and invades the lining tissue of the mother's uterus, the lining tissue responds by surrounding the human embryo and does not cut it off from the mother, but rather establishes a means of close contact (the placenta) between the mother and the new human being.

  6. a) When a parasite invades a host, the host will usually respond by forming antibodies in response to the somatic antigens (molecules comprising the body of the parasite) or metabolic antigens (molecules secreted or excreted by the parasite) of the parasite. Parasitism usually involves an immunological response on the part of the host. (See Cheng, T.C., General Parasitology, p. 8.)
    b) New evidence, presented by Beer and Billingham in their article, "The Embryo as a Transplant" (Scientific American, April, 1974), indicates that the mother does react to the presence of the embryo by producing humoral antibodies, but they suggest that the trophoblast -- the jacket of cells surrounding the embryo -- blocks the action of these antibodies and therefore the embryo or fetus is not rejected. This reaction is unique to the embryo-mother relationship.

  7. a) A parasite is generally detrimental to the reproductive capacity of the invaded host. The host may be weakened, diseased or killed by the parasite, thus reducing or eliminating the host's capacity to reproduce.
    b) A human embryo or fetus is absolutely essential to the reproductive capacity of the involved mother (and species). The mother is usually not weakened, diseased or killed by the presence of the embryo or fetus, but rather is fully tolerant of this offspring which must begin his or her life in this intimate and highly specialized relationship with the mother.

  8. a) A parasite is an organism that, once it invades the definitive host, will usually remain with host for life (as long as it or the host survives).
    b) A human embryo or fetus has a temporary association with the mother, remaining only a number of months in the uterus.

A parasite is an organism that associates with the host in a negative, unhealthy and nonessential (nonessential to the host) manner which will often damage the host and detrimentally affect the procreative capacity of the host (and species).

A human embryo or fetus is a human being that associates with the mother in a positive, healthful essential manner necessary for the procreation of the species.

[This data was compiled by Thomas L. Johnson, Professor of Biology, Mary Washington College, Fredericksburg, VA. Professor Johnson teaches Chordate Embryology and Parasitology. This is reprinted, with the author's permission, from the National Right to Life News, April-May, 1974. It also appears in "The Position of Modern Science on the Beginning of Human Life," by Scientists for Life. $1.75 plus postage for two ounces for each copy to: Sun Life, 2399 Cool Springs Road, Thaxton, VA 24174,
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540/586-4898.]

Note: When some people claim preborn children are parasites, they mean "parasite" in its pejorative, that is, in its social-ethical sense. Prof. Johnson's article addresses only the biological meaning of "parasite." Libertarians for Life responds to the pejorative sense in other articles. Briefly, as libertarians, we strongly agree that women as well as men have the right to control their own bodies. Nonetheless, we hold that under principles of individual liberty, parents have the obligation to support their dependent children. Our children have a right to our support, whether they are in the crib or in the womb.




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LFL explains and defends the libertarian case against abortion choice. Our reasoning is expressly scientific and philosophical rather than either pragmatic or religious, or merely political or emotional.

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I'll never understand how a person can make a mental distinction between the fetus inside the womb and the baby outside the womb. When does the continuum of life begin if not at conception? Abortion is simply barbaric.
 
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