Embryonic Structure
human embryo
hu·man em·bry·o
Definitions related to human embryo:
  • (embryo) Early stage in the prenatal development of an animal. This stage occurs from implantation until closure of the hard palate.
    CDISC Terminology
    Clinical Data Interchange Standards Consortium (CDISC), 2021
  • (embryo) An organism in its initial stage of development following fertilization. The human embryonic period lasts approximately eight weeks, during which time organogenesis takes place.
    NCI
    U.S. National Cancer Institute, 2021
  • (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.
    NCI Dictionary of Cancer Terms
    U.S. National Cancer Institute, 2021
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.