Carnegie stage 2
From Embryology
Introduction
First cell divisions of the zygote forming initially 2 blastomeres and continuing to divide to form the morula.
This early mitosis is a unique embryonic cell cycle (M, S, M phases) compared to adult (M, G1, S, G2, M phase). With virtually no G1 or G2 phases this results in a reduction in cytoplasmic volume of each daughter cell with each cell division. Facts: Week 1, 2-3 days, size 0.1-0.2 mm Features: zona pellucida, blastomeres Links: Week 1 | Blastocyst | Lecture | Medicine Practical | Science Practical | Stage 3
See also Human oocyte to blastocyst
Cite this page: Hill, M.A. (2024, June 2) Embryology Carnegie stage 2. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Carnegie_stage_2
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