Fig. 4From: Validating reference microRNAs for normalizing qRT-PCR data in bovine oocytes and preimplantation embryosRelative expression of porcine miRNAs after normalization with miR-26a, miR-191 and miR-93. (a) miR-21, (b) miR-103, (c) miR-148a, (d) miR-182. Different letters above bars (a,b) indicate values that differ significantly (p < 0.05)Back to article page