Embryo
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Development Context
Commonly used when discussing stages of early human development especially in medical or biological contexts. Researchers study the embryo to understand developmental diseases.
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Sensitive Word
It may evoke emotional responses in discussions about reproduction rights or when discussing pregnancy. Laws regarding embryo research are a topic of ethical debate.
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Time-specific
Specific to the first 8 weeks after conception; after this period, the term 'fetus' is more appropriate. The heart starts beating in the fifth week of the embryo's development.