File:Human-critical periods of development.jpg
Human-critical_periods_of_development.jpg (662 × 406 pixels, file size: 53 KB, MIME type: image/jpeg)
Critical Periods of Human Development
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Dark Orange = major abnormality | Light Orange = minor abnormality |
| The table above identifies approximate windows of time, "critical periods", that following exposure to teratogens can lead to developmental abnormalities (anomalies, congenital).
In general, the effects for each system are more severe (major anomalies) in the embryonic period during organogenesis in the first trimester. Later teratogen exposure are less severe (minor anomalies) in the fetal period during continued growth and differentiation in the second and third trimester. This figure is also available on Human Abnormal Development as a formatted table below. |
| Critical Periods of Human Development | ||||||||||||||||||||
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| Conceptus | Embryonic development (weeks) | Fetal period (weeks) | ||||||||||||||||||
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| Neural | ||||||||||||||||||||
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Heart | |||||||||||||||||||
| Upper limbs | ||||||||||||||||||||
| Lower limbs | ||||||||||||||||||||
| Ear | ||||||||||||||||||||
| Eye | ||||||||||||||||||||
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Palate | |||||||||||||||||||
| Teeth | ||||||||||||||||||||
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External genitalia | |||||||||||||||||||
| Loss | Major abnormalities | Functional and Minor abnormalities | ||||||||||||||||||
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- Links: critical period | Table version | Human Abnormal Development | Teratogens | Thalidomide external effects timeline | Prenatal Diagnosis Category:Timeline
Cite this page: Hill, M.A. (2024, April 19) Embryology Human-critical periods of development.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Human-critical_periods_of_development.jpg
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:41, 28 September 2010 | | 662 × 406 (53 KB) | S8600021 (talk | contribs) |
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File usage
The following 12 pages use this file:
- 2010 BGD Tutorial - Applied Embryology and Teratology
- 2010 Lab 12
- ANZACA Meeting 2012 - Embryology
- Abnormal Development - Environmental
- Abnormal Development - Teratogens
- BGDA Lecture - Development of the Embryo/Fetus 2
- BGDA Lecture - Development of the Nervous System
- BGD Tutorial - Applied Embryology and Teratology
- C
- Foundations Lecture - Introduction to Human Development
- Foundations Practical - Critical Periods
- Pre-Medicine Program - Embryology
