Week 1 Movie

<html5media height="260" width="660">File:Week1_001.mp4</html5media>

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Animation summarising early development in the first week following fertilization

• The conceptus proceeds through embryonic cell cycle rounds of mitosis still enclosed within the zona pellucida. Progressing from a zygote, to blastomeres, then to a morula and finally to a blastocyst.
• The uterine tube epithelium consists of ciliated cells that are moving the secreted fluid towards the uterine body. The conceptus is floating "boat-like" within this fluid and moved in the same direction.
• Towards the end of the first week the blastocyst has reached the uterine body and from about day 5 onwards, the blastocyst "hatches" from the surrounding zona pellucida.
• The conceptus can now receive nutrition directly and can commence the process of implantation in week 2.

Week 1 Links: MP4 version | Quicktime version | Week 1 Overview Movie | Lecture - Week 1 and 2 Development | Week 1 | Blastocyst | Human Blastocyst Mitosis | Blastomere Mitosis Movie | Cell Division - Mitosis | Carnegie stage 3