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In which phase of the menstrual cycle does the endometrium reach its **maximum thickness** of 8–10 mm?
AMenstrual phase
BProliferative phase
COvulatory phase
DLuteal (secretory) phase
Answer & Solution
Correct answer: D. Luteal (secretory) phase
Endometrial thickness: ~1 mm (menstrual) → 3–5 mm (proliferative, under estrogen) → 8–10 mm (luteal, under progesterone from corpus luteum). The thickened, vascular endometrium prepares for implantation.
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