File:Week1 summary.jpg
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Week 1 and 2 Human Development Overview
An overview of development of following fertilization during the first week and into the second week of development. The first week of development occurs floating freely within the uterine tube and body.
Note the timing is only approximate, it is the sequence of events that is important to understand.
- Day 14 of menstrual cycle - Oocyte released from ovary about the midpoint of the menstrual cycle.
- Day 0 - The haploid oocyte and spermatozoa fuse at fertilization to form a diploid zygote, the first cell. Fertilization occurring generally in the first third of the uterine tube (uterine horn, fallopian tube).
- Day 1 to 3 - Cell division by mitosis forming a solid ball of cells, the morula.
- Day 3 to 5 - Cell compaction forming a fluid-filled space and two cell populations, the blastocyst (1-chambered conceptus).
- Day 5 to 7 - blastocyst "hatches" from the surrounding zona pellucida.
- Day 7 to 9 - Implantation commences and continues through the second week of development.
| Week 1 Links: stage 1 | stage 2 | stage 3 | menstrual cycle | fertilization | zygote | morula | blastocyst | Lecture - Fertilization | meiosis | mitosis | Lecture - Week 1 and 2 | menstrual cycle | oocyte | spermatozoa | twinning | Genetic risk maternal age | Trisomy 21 | Trisomy 18 | Trisomy 13 | hydatidiform mole | GA week 3 |
| Week 2 Links: stage 4 | stage 5 | stage 6 | Lecture - Week 1 and 2 | implantation | trophoblast | human chorionic gonadotropin | pregnancy test | twinning | Category:Week 2 | GA week 4 |
Reference
Image Source: Stem Cells Information, NIH USA 2006
Copyright
© 2001 Terese Winslow Images are for educational purposes only and cannot be reproduced electronically or in writing without permission. Terese Winslow LLC
Cite this page: Hill, M.A. (2024, April 20) Embryology Week1 summary.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Week1_summary.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 | 16:18, 7 October 2015 | | 1,000 × 747 (107 KB) | Z8600021 (talk | contribs) | |
| 10:02, 3 August 2009 |  | 800 × 605 (93 KB) | MarkHill (talk | contribs) | Week 1 Human Development An overview of development of the 1-chambered conceptus (blastocyst) Image Source: Stem Cells Information, NIH USA 2006 Image © Therese Winslow |
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File usage
The following 27 pages use this file:
- 2009 Lecture 3
- 2010 BGD Lecture - Development of the Embryo/Fetus 1
- 2010 BGD Practical 3 - Week 1 Summary
- 2010 Foundations Lecture - Introduction to Human Development
- 2010 Lab 2
- 2010 Lecture 3
- ACPS Seminar 2014 - Implantation
- ANAT2341 Lab 2 - Week 1
- BGDA Lecture - Development of the Embryo/Fetus 1
- BGDA Practical 3 - Week 1 Summary
- BGDB Gastrointestinal - Activity 1
- BGDB Gastrointestinal - Trilaminar Embryo
- Fertilization
- Foundations Lecture - Introduction to Human Development
- Foundations Practical - Week 1 and 2
- Implantation
- Implantation Timeline
- K12 Comparative Embryology
- Lecture - Week 1 and 2 Development
- Ovary Development
- Pre-Medicine Program - Embryology
- REI - Reproductive Medicine Seminar 2018
- Week 1
- Week 1 - Abnormalities
- Week 2
- Talk:Timeline human development
- Template:Week 1 table
