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...lar layer separating ectoderm and endoderm, mesoderm also lies outside the embryo as '''extra-embryonic mesoderm''' (covered in placenta lecture). Embryonic | {{Embryo logocitation}}

Department of EmbryologyThe Carnegie Institution Of Washington, Baltimore, Maryland ...empt was made to recover a specimen comparable to the youngest known human embryo.

...a description of early {{twinning}}. The embryo is classified as Carnegie Embryo No. {{CE1522}}. Department of Embryology, Carnegie Institution of Washington

...ola. Human Embryology and Teratology. (1990) Lippincott Williams & Wilkins 400 pages ...The future dorsal foramina (containing dorsal rami) face laterally in the embryo and are in line with the thoracicolumbar intervertebral foramina. Considera

[[File:Stage11_sem6.jpg|thumb|300px|Human embryo (Week 4, 24 days, Carnegie stage 11, 13 somite pairs)]] ...ic tissues and systems are beginning to differentiate) from the trilaminar embryo. With many parallel processes, descriptions begin to get complicated! Many

| width=420px|<html5media height="600" width="400">File:Stage20 MRI S02.mp4</html5media> [[File:Kyoto Embryo Collection - cover.jpg|200px|link=http://itunes.apple.com/us/book/id1143922

[[File:Carnegie stages species comparison.jpg|500px]] ...mid:20615540|PMID20615540}} "Sheep preantral follicles (PFs) measuring 250-400 microm in diameter were cultured for six days in serum-free media supplemen

! 1910-30 Carnegie Stages | [[File:Human Carnegie stage 10-23.jpg|600px|link=Carnegie Stages]]

! 1910-30 Carnegie Stages | [[File:Human Carnegie stage 10-23.jpg|600px|link=Carnegie Stages]]

[[Carnegie stage 1]] ...a. 0.1 mm) and weight (ca. 0.004 mg) of the organism at fertilization, the embryo is "''schon ein individual-spezifischer Mensch''" (Blechschmidt, 1972). The

...ht, Sitting Height, Head Size, Foot Length, and Menstrual Age of the Human Embryo= Published by the Carnegie Institution of Washington Washington, 1920

Department of Embryology, Carnegie Institution of Washington ..., with all parts in their natural connection and the contours of the Whole embryo and of the different organs clearly recognizable. On the other hand, the la

...cess of implantation and early differentiation of cells that will form the embryo and the placenta. ...to all material derived from this fertilized zygote and includes both the embryo and the non-embryonic tissues (placenta, fetal membranes).

...in the embryo as at birth, but the deformities of the head and neck of the embryo are of such a nature that it can not survive long enough to admit of compar ...xomphaly. Other anomalies, however, are more difficult to recognize in the embryo as sharply defined malformations.

* Embryo 1 - 17th day of the menstrual cycle, ovulation probably occurred less than * Embryo 2 - 16th day of the cycle; coitus had taken place 2 and 4 days previously.

[[File:Stage_22_image_217.jpg|thumb|300px|Cerebrum development human embryo (week 8, Stage 22)]] | {{Embryo logocitation}}

[[File:Human Carnegie stage 10-23.jpg|thumb|Carnegie Embryos]] [[File:Streeter02.jpg|thumb|Measuring embryo size]]

...in the embryo as at birth, but the deformities of the head and neck of the embryo are of such a nature that it cannot live long enough to admit of comparison ...r, are more difficult to recognize as sharply defined malformations in the embryo.

...parturition) is approximately 64 days and there have been identified about 400 congenital disorders relating to dog development. Many of these development [[File:Canine embryo E35-38 image003.jpg|thumb|Canine Embryo (E35-38)]]

...by Odgers describes an early embryo development, later characterised as [[Carnegie stage 8]]. {{Carnegie stage 8 links}}