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What phase of the menstrual cycle is represented here? What evidence supports this?
Trilaminar appearance of the endometrium is typical for the proliferative phase. Absence of a corpus luteum is concordant with this.
Typical trilaminar appearance of the endometrium in the proliferative phase of the menstrual cycle. The uterus incidentally, is retroverted. Note that no corpus luteum is present at this stage.