Menstruation: Noun. The process in a woman of discharging blood and other materials from the lining of the uterus at intervals of about one lunar month from puberty until menopause, except during pregnancy.

I can't put my finger on it, but for some reason this image is giving me flashbacks to the time in the sixth grade when they let the boys out to recess early and took us girls in a separate room to show us a short film on one of those old 16mm film projectors about becoming a woman, and gave us all pamphlets about going through "the change." Oooh, that's it! This totally reminds me of the cover of that pamphlet. If you overlaid the words "Menstruation & You" over Gwyneth Paltrow's face in some kind of fancy script font, it would be a damn near match.