If a woman experiences consistently short luteal phases due to inadequate progesterone secretion after ovulation, what consequence becomes most likely, assuming normal follicle development and fertilization?

💡 Explanation

Inadequate progesterone during the luteal phase impairs endometrial receptivity because the endometrium fails to properly thicken and vascularize. Therefore, implantation failure is likely, rather than increased estrogen which would not be affected by luteal phase length, or an LH surge suppression problem which precedes ovulation.

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