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Mitochondrial DNA (mtDNA) copy number (CN) and mtDNA 4977 bp (mtDNA4977) deletion rate (DR) in women with PCOS and controls. (A) Log-transformed mtDNA CN in women with PCOS and controls (**P = 0.002). (B) Log-transformed mtDNA4977 DR in women with PCOS and controls (***P < 0.001).
