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Embryo Research
Embryo Cell Research; Embryo Experimentation; Cell Research, Embryo; Embryo Experimentations; Embryo Research, Human; Experimentation, Embryo; Experimentations, Embryo; Research, Embryo; Research, Embryo Cell; Research, Human Embryo
Experimentation on, or using the organs or tissues from, a human or other mammalian conceptus during the prenatal stage of development that is characterized by rapid morphological changes and the differentiation of basic structures. In humans, this includes the period from the time of fertilization to the end of the eighth week after fertilization.