1. the first and shortest stage of prenatal development is where the the zygote begins to grow in complexity during the first two weeks of conception. 2. the stage lasts from 2 - 8 weeks following fertilization, when major organs and basic anatomy begin to develop. 3. the stage lasts from 8 weeks until birth and involved the differentiation of major organs.
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1. the first and shortest stage of prenatal development is where the the zygote begins to grow in c...
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