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Based on the facts of science, when does every new human life begin?

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Per the "American Heritage Dictionary of Science," there are four defining characteristics of life: (1) growth, (2) reproduction, (3) response to stimuli, and (4) metabolism. Numerous scientific publications show that these processes of life all occur during or within moments after fertilization. Thus, the medical textbook "The Developing Human: Clinically Oriented Embryology" states that "fertilization" creates "a new combination of chromosomes that is different from that in the cells of either of the parents," and this "is the beginning of a new human being."

DocumentationWhen Does Life Begin?Human Development




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