Sally Ride was the first American woman and first lesbian in space, first flying in 1983. Before she flew, NASA weren't really sure what a woman in space might need, so suggested providing her with 100 tampons. For a six day mission.
@vagina_museum It's easy to make fun of NASA, but they're definitely not stupid. They ALWAYS plan for a variety of scenarios, which may include an unexpected prolongation of the mission - as has happened last year when a return capsule failed. Add the typical NASA redundancy and insecurity about physiological processes in space, and 100 tampons doesn't seem unreasonable.