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what happens to the thickness of the uterine when the levels of the progresterone hrmone reaches it highest levels

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During the second phase of the menstrual cycle, the effects of progesterone result in the proliferation of the endothelial lining in the endometrium, resulting in a thickened endometrial wall. The result is an increased thickness and surface area of the endometrium in which implantation can occur.
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