Dr. Maureen Condic, an associate professor of neurobiology and anatomy who received her doctorate in neurobiology from the University of California (Berkeley), has just published a major paper on when human life begins.
She recently sat down with Zenit news for an interview about her scientific findings. The following blips are a few highlights from the interview:
Zenit: You define the moment of conception as the second it takes for the sperm and egg to fuse and form a zygote. What were the scientific principles you used to arrive at this conclusion?
Condic: The central question of "when does human life begin" can be stated in a somewhat different way: When do sperm and egg cease to be, and what kind of thing takes their place once they cease to be?To address this question scientifically, we need to rely on sound scientific argument and on the factual evidence. Scientists make distinctions between different cell types (for example, sperm, egg and the cell they produce at fertilization) based on two simple criteria: Cells are known to be different because they are made of different components and because they behave in distinct ways.These two criteria are used throughout the scientific enterprise to distinguish one cell type from another, and they are the basis of all scientific (as opposed to arbitrary, faith-based or political) distinctions. I have applied these two criteria to the scientific data concerning fertilization, and they are the basis for the conclusion that a new human organism comes into existence at the moment of sperm-egg fusion.
Zenit: Many in the scientific world would say that fertilization doesn't happen in a moment, but rather that it is a process that comes to an end at the end of the first cell cycle, which is 24 hours later. Why is it important to define a "moment of conception," as opposed to a "process of fertilization"?
Condic: It is not important to somehow define a "moment" or a "process" of fertilization in the abstract. It is important to base conclusions and judgments about human embryos on sound scientific reasoning and on the best available scientific evidence.Had this analysis led to a different conclusion -- for example, that fertilization is a "process" -- I would have accepted this conclusion as scientifically valid. However, a scientific analysis of the best available data does not support the conclusion that fertilization is a "process"; it supports the conclusion that fertilization is an event that takes less than a second to complete.The events of the first 24 hours following sperm-egg fusion are clearly unique, but they are also clearly acts of a human organism, not acts of a mere human cell.
Zenit: Do opinion, belief and politics have a place in defining the beginning of a new life? How is it that the topic has become an issue of debate?
Condic: …It is important to appreciate that the scientific facts are themselves entirely neutral; they are simply a reflection of the way the world is… While people are free to formulate their opinion on when human life begins in any manner they choose (including belief and politics), not all opinions are equally consistent with factual reality. Those who choose to ignore the facts cannot expect their opinions to garner as much respect or to be given as much credibility as those who base their opinions in sound scientific observation and analysis. [Comment: So people can say that life doesn’t begin until birth – but the scientific truth of the matter is that it begins at the moment, less than a second long, of conception]
For more, check out the full article.
You can also read her paper: When does human life begin?