The Normal Histology of the Endometrium
The endometrium of the corpus is composed of two layers: the basalis (the layer from which the endometrium regenerates after menstrual shedding) and the overlying functionalis. In the second half of the menstrual cycle, the functionalis may be differentiated into the superficial compacta and the underlying spongiosa, which extends to the basalis. During the menstrual cycle the endometrium varies from 1 mm (postmenstrual) to about 8 mm at the end of the third week. Every layer consists of two major components: the epithelial component, either as glands (or as superficial epithelium), and the mesenchymal component of stromal cells with pluripotential properties.
KeywordsStromal Cell Secretory Phase Proliferative Phase Glandular Epithelium Fibrinolytic Enzyme
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