Etiology and Secular Trends in Primary Amenorrhea in 856 Patients: A 17-Year Retrospective Multicenter Study in Korea.

J Korean Med Sci · 2022 · PMC9313977 · PMID 35880506

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did not reach statistical significanceno p-value reported

The proportion of anovulation including polycystic ovarian syndrome increased with time, but the change did not reach statistical significance.

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