Valentina Tereshkova
There were six Vostok flights in total, including the June, 1963 Vostok 6 mission flown by Valentina Tereshkova, the first woman in space. Another seven Vostok flights (Vostok 7 to 13) were originally planned, going through to April 1966, but these were canceled and the components recycled into the Voskhod program, which was intended to achieve more Soviet firsts in space.