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Embryo: Early stage in the development of a plant or an animal. In vertebrate animals (have a backbone or spinal column), this stage lasts from shortly after fertilization until all major body parts appear. In particular, in humans, this stage lasts from about 2 weeks after fertilization until the end of the seventh or eighth week of pregnancy.
Source: National Institute of Health
Embryo: The very early stages of the production of a fetus.
Condition count: 0
Organs: list of all organs
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