Menstruation
Menstruation is the most visible phase of the menstrual cycle and its beginning is used as the marker between cycles. The first day of menstrual bleeding is the date used for the last menstrual period (LMP). The typical length of time between the first day of one period and the first day of the next is 21 to 45 days in young women, and 21 to 31 days in adults (an average of 28 days).
The Story of Menstruation
The film uses animated diagrams to detail the menstrual cycle. The film's narrator, who is not identified in the credits, informs the viewer that "there is nothing strange or mysterious about menstruation", and it shows women engaged in such activities as bathing, riding a horse, and dancing during their menstrual cycles. The film's narration by actress Gloria Blondell also provides advice to avoid constipation and depression, and to always keep up a fine outward appearance.