Human Embryo Collections
Introduction
While many universities hold collections of embryos from many species, very few have well-characterised collections of embryos showing human development. Many of those that are available are historic in nature, some with limited information about the embryo history.
- Carnegie Stages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | About Stages | Timeline
Carnegie Collection
thumb|Carnegie Embryos (Carnegie Institution, USA)
- Many of these embryos were used in the historic papers in the Contributions to Embryology series - Carnegie Institution of Washington Series.
Kyoto Collection
(Kyoto University, Japan)
- Begun by Dr. Hideo Nishimura in 1961 and has over 44,000 human embryo specimens.
- Polydactyly in human embryos[1]
- 129 embryos with polydactyly in 36,380 human conceptuses obtained through induced abortion during the period from 1962 to 1974.
- Human embryo imaging with a super-parallel magnetic resonance (MR) microscope[2]
- Links: Kyoto Collection
Central Laboratory for Human Embryology
(University of Washington, USA)
Hamilton-Boyd Collection
(Cambridge University, UK)
- Collected by Professor JD Boyd, Professor of Anatomy at the University in the 1950s and 1960s.
- Held at the University of Cambridge.
- Professor Boyd wrote the monographs 'Human Embryology' (Hamilton, Boyd and Mossman) and 'The Human Placenta' (Boyd and Hamilton).
- Collection is only histological sections (no tissue blocks remain).
- Links: Boyd Collection
Blechschmidt Collection
(University of Goettingen, Germany)
Carnegie Stage Table
Weeks shown in the table below are embryonic post ovulation age, for clinical Gestational Age (GA) measured from last menstrual period, add 2 weeks.
(not to scale) |
||||
fertilized oocyte, zygote, pronuclei | ||||
morula cell division with reduction in cytoplasmic volume, blastocyst formation of inner and outer cell mass | ||||
loss of zona pellucida, free blastocyst | ||||
attaching blastocyst | ||||
(week 2) |
implantation | |||
extraembryonic mesoderm, primitive streak, gastrulation | ||||
gastrulation, notochordal process | ||||
primitive pit, notochordal canal | ||||
Somitogenesis Somite Number 1 - 3 neural folds, cardiac primordium, head fold | ||||
Somite Number 4 - 12 neural fold fuses | ||||
Somite Number 13 - 20 rostral neuropore closes | ||||
Somite Number 21 - 29 caudal neuropore closes | ||||
Somite Number 30 leg buds, lens placode, pharyngeal arches | ||||
lens pit, optic cup | ||||
lens vesicle, nasal pit, hand plate | ||||
nasal pits moved ventrally, auricular hillocks, foot plate | ||||
finger rays | ||||
ossification commences | ||||
straightening of trunk | ||||
upper limbs longer and bent at elbow | ||||
hands and feet turned inward | ||||
eyelids, external ears | ||||
rounded head, body and limbs | ||||
The embryos shown in the table are from the Kyoto and Carnegie collection and other sources.
References
Glossary Links
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Cite this page: Hill, M.A. (2024, June 17) Embryology Human Embryo Collections. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Human_Embryo_Collections
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G