Cleavage Stage, Ovum
| Medical Definition: |
The embryo in its earliest stage, lasting from the first mitotic division of the fertilized ovum (ZYGOTE) into two BLASTOMERES to the formation of the MORULA, a compact mass of blastomeres. |
| Guide Notes: |
note category; "the embryo in its earliest stage" |
| Previously Indexed: |
Cell Division (1966-1979),Mitosis (1968-1979),Ovum (1966-1979),Zygote (1975-1979) |
Cleavage Stage, Ovum Categories.
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Blastula - An early non-mammalian embryo (EMBRYO, NONMAMMALIAN) that follows the MORULA stage. Blastula is usually a spherical structure containing a single layer of cells with a hollow cavity. |
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Morula - The early embryo at the developmental stage in which the BLASTOMERES, resulting from repeated mitotic divisions of the fertilized ovum (ZYGOTE), form a compact cell mass. |
Cleavage Stage, Ovum Medical Definitions and Terms
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