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Copy number of cell‐free nuclear DNA (cf‐N‐DNA) and cell‐free mitochondrial DNA (cf‐Mt‐DNA) in FF. Two batches of follicular fluid were aspirated from 15 randomly selected antral follicles (3‐6 mm in diameter) of each of 16 gilts (A). cfDNA was extracted from the FF, and the cf‐N‐ and cf‐Mt‐DNA contents in FF were determined by real‐time PCR. The cf‐N‐DNA (B) and cf‐Mt‐DNA (C) were compared between the two FF batches. Y axis and X axis: cfDNA copy number in 1 µL of FF
