A study in humans identified the miR-136-5p as a menstrual blood-specific miRNA, screened for its potential in distinguishing vaginal secretions and menstrual blood [Li et al. DOI:10.1093/fsr/owad003]. A study in rats demonstrated that the miR-136-5p is a predicted target of multiple heroin-associated circRNAs from a microarray list, specifically predicted to bind four such circRNAs [Floris et al. DOI:10.3390/ijms23031453].