An IVF patient receives progesterone supplementation during the luteal phase. Which outcome is most likely if progesterone secretion remains abnormally low despite supplementation?

💡 Explanation

The endometrial lining requires progesterone for continued support and development in preparation for implantation. Insufficient progesterone leads to endometrial breakdown because the corpus luteum's secretion is inadequate. Therefore, the endometrial lining won't be maintained, rather than FSH release, estradiol, or an LH surge.

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