File:1 Min Embryo - Human timeline.mp4: Difference between revisions
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Revision as of 10:39, 28 April 2016
One Minute Embryology - Human Timeline
- Links: original movie page | UNSW theBox | BGDA lecture | BGDA Prac 3 | BGDA Prac 6 | Embryonic Development | Fetal Development
Audio Script
Hi there,
Lets look at an overview of human development
Human pregnancy occurs over 9 months.
This is traditionally divided into 3 trimesters each 3 months long.
The first trimester is mainly the embryonic period.
While the second and third trimester is the fetal period of growth.
The embryonic period is divided into 23 “stages” over the first 8 weeks.
After the last menstrual cycle, this period also covers the next 2 and a half missed cycles.
Human pregnancy is measured from this last cycle, while fertilisation occurs around ovulation of the next missed cycle.
A positive pregnancy test can be seen 2 weeks later after fertilisation.
The fertilised oocyte is called a zygote, that divides to form a morula.
Further mitotic division forms a blastocyst.
Forming a bilaminar then trilaminar embryo in week 3.
Looking at events
end of week 1 - blastocyst hatching
week 2 - Implantation in the uterus
week 3 - Key developmental processes
week 4 - the heart and other structures form
Cite this page: Hill, M.A. (2024, June 16) Embryology 1 Min Embryo - Human timeline.mp4. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:1_Min_Embryo_-_Human_timeline.mp4
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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