I’ve done it. Usually, though, it’s done to illustrate, for instance, normal morphology, for contrast with your experimental results. Or as a key for the anatomy. Or even sometimes as a small, tasteful bit of decoration, as long as it doesn’t detract or distract from the data. In this poster, Use of yeast lysate in women with recurrent vulvovaginal candidiasis by Vrzal et al., presented at the 8th Vaccine & ISV Congress in Philadelphia, I’m rather at a loss to figure out the purpose of these illustrations.