Development of the Human Zygote

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November 16, 1995         Hundreds of thousands of times a year a single-celled zygote, smaller than a grain of sand, transforms into an amazingly complex network of cells, a newborn infant. Through cellular differentiation and growth, this process is completed with precision time and time again, but very rarely a mistake in the 'blueprint' of growth and development does occur. Following is a description of how the pathways of this intricate web are followed and the mistakes which …

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