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Venn diagrams for microRNA (miRNA) expression pattern (A) and piwi-interacting RNA (piRNA) expression pattern (B). The sncRNAs (miRNA and piRNA) unique to the blastocoele fluid are written in red; sncRNAs written in green are unique to the blastocyst spent culture medium by the fifth day after fertilization; sncRNAs are written in blue provided that they are detected both in the blastocoele fluid and in the blastocyst spent culture medium.
