Help with Female Physiology - Anatomy

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Question

The luteal surge is caused by which effect in the body?

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Answer

Estradiol levels in the body are typically controlled with a negative feedback loop; however, the luteal surge results in a positive feedback loop for estradiol. Instead of luteinizing hormone levels decreasing under high estradiol levels, they increase. As a result, estradiol levels continue to rise. This dramatic increase of estradiol and luteinizing hormone is called the luteal surge, and results in ovulation.

The corpus albicans develops from the corpus luteum only after ovulation, and is responsible for regulating progesterone levels after the egg has been released.

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