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| [[File:Mark_Hill.jpg|90px|left]] This historic 1974 paper by Nishimura and colleagues describes human embryos from the [[Kyoto Collection]]. | |||
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=Normal Development of Early Human Embryos: Observation of 90 Specimens at Carnegie stages 7 to 13= | =Normal Development of Early Human Embryos: Observation of 90 Specimens at Carnegie stages 7 to 13= |
Latest revision as of 14:04, 23 October 2017
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Nishimura H. Tanimura T. Semba R. Uwabe C. Normal development of early human embryos: Observation of 90 specimens at Carnegie stages 7 to 13. (1974)Teratology 10(1): 1-5. PubMed 4853372
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Pages where the terms "Historic" (textbooks, papers, people, recommendations) appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms, interpretations and recommendations may not reflect our current scientific understanding. (More? Embryology History | Historic Embryology Papers) |
Normal Development of Early Human Embryos: Observation of 90 Specimens at Carnegie stages 7 to 13
Abstract
1. A systematic analysis of the relation between 2 parameters of developmental stage — clinically assessed embryonic age and growth — was made for 90 human embryos at Carnegie stages 7–13 from healthy pregnancies.
2. The data showed remarkable individual variation in the relation between age and developmental stage of embryos at stages 11–13. It appears that the mean age for these stages in our specimens was a few days greater than the corresponding age in the currently cited standards, although a definite conclusion must await further studies.
3. The relation between body length and developmental stages in our embryos was not different from the corresponding standards presented by previous investigators. The relation of the number of somites to developmental stage and greatest length in 13 embryos at stages 9–11 was approximately in accord with that reported for several corresponding embryos by other investigators.
4. The oldest age for embryos at each stage in our data may have practical use in denying a causal relation between the exposure of pregnant women to an exogenous agent at such a stage and the subsequent appearance of specific malformations in their progeny.
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Cite this page: Hill, M.A. (2024, May 21) Embryology Paper - Normal development of early human embryos: Observation of 90 specimens at Carnegie stages 7 to 13. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Paper_-_Normal_development_of_early_human_embryos:_Observation_of_90_specimens_at_Carnegie_stages_7_to_13
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G