When Rayka Zehtabchi won an Oscar for "Period. End of Sentence.", she proclaimed that a period should end a sentence, not an education. Her documentary focuses on the use of sanitary pads in India during women's menstrual cycles, and also the efforts to end the stigma around the topic.
I remember reading about how, when Lucille Ball was pregnant, the network told her that she wasn't allowed to say pregnant on TV. The fact that it's now acceptable to talk about menstruation on the Academy Awards shows how far our society has advanced. Of course, we still have a ways to go. In the meantime, definitely check out this documentary.