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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


WikiDoc Resources for Embryology


Most recent articles on Embryology

Most cited articles on Embryology

Review articles on Embryology

Articles on Embryology in N Eng J Med, Lancet, BMJ


Powerpoint slides on Embryology

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Podcasts & MP3s on Embryology

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Evidence Based Medicine

Cochrane Collaboration on Embryology

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Clinical Trials

Ongoing Trials on Embryology at Clinical Trials.gov

Trial results on Embryology

Clinical Trials on Embryology at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Embryology

NICE Guidance on Embryology


FDA on Embryology

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Books on Embryology


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Directions to Hospitals Treating Embryology

Risk calculators and risk factors for Embryology

Healthcare Provider Resources

Symptoms of Embryology

Causes & Risk Factors for Embryology

Diagnostic studies for Embryology

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Continuing Medical Education (CME)

CME Programs on Embryology


Embryology en Espanol

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Experimental / Informatics

List of terms related to Embryology

Embryology is the study of the development of an embryo. An embryo is defined as any vertebrate in a stage before birth or hatching. Embryology is more specific as it only encompasses the modern definition: an animal that is undergoing early development including the formation of primitive organ systems, the creation of fundamental tissues, and cleavage; especially involving the development of human individuals from the moment the blastocyst is implanted until the end of the eight week after conception. Past the eight week, the developing animal is called a fetus.


After the 1950s, with the DNA helical structure being discovered by James D. Watson and Francis Crick, (in collaboration with Rosalind Franklin and Maurice Wilkins) and the increasing knowledge in the field of molecular biology, developmental biology emerged as the field of study that correlates the genes and such morphological changes; in other words, which genes are responsible for each morphological change that takes place in an embryo, and how these genes are regulated.

Vertebrate and invertebrate embryology

Many principles of embryology apply to both invertebrate animals as well as to vertebrates.[1] Therefore, study of invertebrate embryology has advanced the study of vertebrate embryology. However, there are many differences as well. For example, numerous invertebrate species release a larva before development is complete; at the end of the larval period, an animal for the first time looks like an offspring of its parents. Although invertebrate embryology is similar in some ways for different invertebrate animals, there are also countless variations. For instance, some insects proceed directly from egg to adult form whereas others develop through an elaborate sequence of changes.


Neuroembryology refers to the development of an embryos nervous system. At the middle of the third week the neural plate appears which originates from the ectoderm.

See also


  1. Parker, Sybil. "Invertebrate Embryology," McGraw-Hill Encyclopedia of Science & Technology (McGraw-Hill 1997).


  • UNSW Embryology Large resource of information and media
  • [2] Definition of embryo according to Webster

Further reading

  • Scott F. Gilbert. Developmental Biology. Sinauer, 2003. ISBN 0-87893-258-5.
  • Lewis Wolpert. Principles of Development. Oxford University Press, 2006. ISBN 0-19-927536-X.

External links

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