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Do human beings begin at fertilization?

November 29, 2012/3 Comments/in Biology /by Monica Snyder

Hydatidiform moles occur when an egg without a nucleus gets fertilized; this fertilized egg does not have the genetic code of a human organism and will never develop into an infant. Some argue, then, that fertilization isn’t a defining moment and that it’s incorrect to say fertilized eggs are human beings.

The Life Training Institute wrote a post on this unusual situation, quoting from Maureen Condic‘s article, “A Biological Definition of the Human Embryo.” The bottom line:

If the necessary structures (molecules, genes etc.) required for development (i.e., an organismal level of organization) do not exist in an entity from the beginning, the entity is intrinsically incapable of being an organism and is therefore not a human being. 

When we say “human beings begin at fertilization” we are actually using a sort of shortcut. It takes a lot longer to say “human beings are human organisms that have begun the course of human development.” In the vast majority of cases, fertilization is the point when a new human organism begins the course of human development, and so we just say “fertilization.” However, there are some fertilized eggs that are not organisms (hydatidiform moles), and there are some organisms that do not begin human development until well after fertilization (the second embryo in a pair of identical twins).

If fertilization is usually–but not always–the beginning of a new human being, does this mean we don’t really know when human beings begin? Nope. We know. I will say again: human beings begin when a new human organism begins the process of human development. This means the second embryo in a pair of twins is a human being, and a hydatidiform mole is not a human being.

Check out the rest of The Life Institute’s post for some great analogies between hydatidiform moles, the Alphabet Song, and wildlife spotting. 🙂

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Tags: biology, fetal development, M
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https://secularprolife.org/wp-content/uploads/2021/10/SecularProlife2.png 0 0 Monica Snyder https://secularprolife.org/wp-content/uploads/2021/10/SecularProlife2.png Monica Snyder2012-11-29 16:42:002021-11-24 18:54:42Do human beings begin at fertilization?
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3 replies
  1. Clinton Wilcox
    Clinton Wilcox says:
    November 30, 2012 at 1:00 am

    Great article.

    As a musician myself, I especially related to the analogy between the Alphabet Song and the other two.

    Log in to Reply
  2. Kara Baylog
    Kara Baylog says:
    November 30, 2012 at 6:55 am

    Interesting. I was not away of any of these anomalies. Thanks!

    Log in to Reply
  3. ConservativeRONPAUL
    ConservativeRONPAUL says:
    November 30, 2012 at 8:58 pm

    Yes, ignore "humanity" as a social construct. let's talk about "humanity" as a biological organism. Obviously we need to change state and federal laws to define "humanity" as a biological state rather than a social construct.

    Log in to Reply

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