Fig. 4.

Measured blood volumes compared with the menstrual pictogram scores. Known volumes of blood were applied to Kotex Regular maxi towels to produce similar stain sizes to those depicted by the highlighted icon scores on the menstrual pictogram of Wyatt et al., which was validated using an older, obsolete version of the same sanitary product. The difference in volume required and the effect of towel compression on stain area are shown. MP menstrual pictogram. Reprinted from a poster with permission from the author: Burnett PE et al., Comparison of Menstrual Pictogram Scoring to the Validated Alkaline Hematin Assay as Techniques for Measuring Blood Loss on Feminine Hygiene Products [75]