Carnegie Stage Comparison
Introduction
Stages are based on the external and/or internal morphological development of the vertebrate embryo, and are not directly dependent on either age or size. The human embryonic period proper is divided into 23 Carnegie stages. Criteria beyond morphological features include age in days, number of somites present, and embryonic length.
As this staging can be applied to all vertebrates, and most vertebrate embryos develop during the embryonic period in much the same way, we can directly compare the timing of development for different species.
From the table you can see that to reach the end of embryonic development, Carnegie stage 23, can take from as little as 10 days in chickens to nearly 60 days in humans.
Carnegie is the name of a historical US Institute that historically categorised these developmental stages, and continues to study embryology today.
Species Comparison of Carnegie Stages
Data For Carnegie Stages Comparison Graph (Species/Days)
Species | Stage | |||||||||||||||
Human[1] | Days | 20 | 22 | 24 | 28 | 30 | 33 | 36 | 40 | 42 | 44 | 48 | 52 | 54 | 55 | 58 |
Baboon[2] | Days | 23 | 25 | 27 | 28 | 29 | 30 | 31 | 33 | 35 | 37 | 39 | 41 | 43 | 45 | 47 |
Rhesus Monkey[3] | Days | 21 | 22 | 25 | 28 | 29 | 30 | 32 | 34 | 36 | 37 | 38 | 40 | 42 | 44 | 46 |
Marmoset[4] | Days | 57 | 60 | 64 | 67 | 74 | ||||||||||
Mouse[5] | Days | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 13.5 | 14 | 14.5 | 15 | 15.5 | 16 |
Rat[6] | Days | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 13.5 | 14 | 14.5 | 15 | 15.5 | 16 | 16.5 | 17 | 17.5 |
Chinese Hamster | Days | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 13.5 | 14 | 14.5 | 15 | 15.5 | 16 | 16.5 | 17 |
Guinea Pig | Days | 14.5 | 15 | 15.5 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 29 |
Rabbit | Days | 8 | 8.5 | 9.5 | 10.5 | 11 | 12 | 12.5 | 13.5 | 14 | 14.5 | 15.5 | 16 | 16.5 | 17 | 18 |
Sheep | Days | 15 | 16 | 17.5 | 18.5 | 19.5 | 20.5 | 22 | 23 | 24.5 | 25.5 | 27.5 | 29.5 | 30 | 33 | |
Pig | Days | 14 | 15 | 16 | 17 | 18 | 19 | 20.5 | 21.5 | 23 | 24 | 25.5 | 27.5 | 29 | 30.5 | 32.5 |
Chicken | Days | 1 | 1.5 | 2 | 2.25 | 2.5 | 3 | 3.25 | 3.75 | 4.75 | 5.5 | 6.25 | 7.25 | 7.75 | 8.5 | 10 |
Dog | Days | 27 | 28 | 29 | 30 | 34 | 36 | 37 |
Source: Butler, H. and Juurlink, B.H.J. An atlas for staging mammalian and chick embryos. CRC Press Inc., Florida (1987) and specific references listed below.
References
- ↑ <pubmed>400868</pubmed>
- ↑ Hendrickx Embryology of the baboon. University of Chicago Press.
- ↑ Hendrickx and Sawey Embryology of the rhesus monkey. The Rhesus Monkey, Bourne (ed), Academic Press, NY (1975)
- ↑ <pubmed>827927</pubmed>
- ↑ Theiler, K. The House Mouse: Atlas of Embryonic Development. 1989. New York: Springer-Verlag. ISBN 3 540 05940 7
- ↑ Witschi, E. Growth. Altman and Dittmer (ed), Fed. Soc. Exp. Biol., Washington (1962)
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Cite this page: Hill, M.A. (2024, April 19) Embryology Carnegie Stage Comparison. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Carnegie_Stage_Comparison
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G