Figure 1. Aberrant expression of miRNAs in the sperm of aging males. (A) The distribution of miRNAs and piRNAs in the sperm of the aged and the young males. (B) The 33 miRNAs co-upregulated in the sperm and embryos of the aged compared to the young group. (C) The potential pathways of the 33 miRNAs predicted by the online bioinformatics tool mirPath.