Scientific Source #132 – Medical Textbook

“A zygote (a single fertilized egg cell) represents the onset of pregnancy and the genesis of new life.” 132 132 Turner, J.S. & Helms, D.B., Lifespan Development, 2nd ed., CBS College Publishing (Holt, Rhinehart, Winston), 1983, 53.

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Scientific Source #131 – Medical Textbook

“Each human begins life as a combination of two cells, a female ovum and a much smaller male sperm.” 131 131 Clark, J. ed., The Nervous System: Circuits of Communication in the Human Body, Torstar Books Inc., Toronto, 1985, 99.

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Scientific Source #130 – Medical Textbook

“The development of a new human being begins when a male’s sperm pierces the cell membrane of a female’s ovum, or egg.” 130 130 Scarr, S., Weinberg, R.A., & Levine, A., Understanding Development, Harcourt Brace Jovanovich, Inc., 1986, 86.

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Scientific Source #129 – Medical Textbook

“Genetically, the zygote is complete. It represents a new single-celled individual.” 129 129 Thibodeau, G.A. & Anthony, C.P., Structure and Function of the Body, 8th edition, St. Louis: Times Mirror/Mosby College Publishers, St. Louis, 1988, 410.

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Scientific Source #128 – Medical Textbook

“The zygote therefore contains a new arrangement of genes on the chromosomes never before duplicated in any other individual. The offspring destined to develop from the fertilized ovum will have a genetic constitution different from anyone else in the world.” 128 128 DeCoursey, R.M., The Human Organism, 4th edition McGraw Hill Inc., Toronto, 1974, 584.

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Scientific Source #127 – Article

“The two cells gradually and gracefully become one. This is the moment of conception, when an individual’s unique set of DNA is created, a human signature that never existed before and will never be repeated.” 127 127 In the Womb, National Geographic, 2005.

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Scientific Source #125 – Medical Textbook

“It should always be remembered that many organs are still not completely developed by full term and birth should be regarded only as an incident in the whole developmental process..” 125 125 Beck, F., Human Embryology, Blackwell Scientific Publications, 1985, vi-vii.

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Scientific Source #124 – Medical Textbook

“In that fraction of a second when the chromosomes form pairs, the sex of the new child will be determined, hereditary characteristics received from each parent will be set, and a new life will have begun.” 124 124 Kaluger, G. & Kaluger, M., Human Development: The Span of Life, The C.V. Mosby Co., St. Louis,…

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Scientific Source #123 – Report

“The fertilized egg cell—or zygote—contains nuclear material from both parents. It marks the beginning of the life of a new human being and is a useful focal point for presenting all the diverse aspects of organic reproduction.” 123 123 Simpson, G. & Beck, W., Life: An Introduction to Biology 139 (2d ed. 1965) (cited in…

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