Perhaps the parent poster didn't intend to offend, and just wanted to pass along some personal information? It's hard to tell. To be clear, this type of gender-based ban is rediculous.
A brief search on this shows there's a much more balanced information out there. Here are some interesting snips from a CS Monitor article on Tereshkova.
http://www.csmonitor.com/Science/2013/0614/First-woman-in-sp...
She actually solved the first big problem in her flight: On the first day, the ship's autopilot mistakenly steered her away from Earth, leaving her facing the prospect of being lost in space.
After her trip, the Soviet space program canceled any future trips for women, and indeed, Tereshkova remained the only woman to go to space for almost two decades. In 1982, the Soviets launched a second woman, Svetlana Savitskaya, and the next year, America sent up Sally Ride. Since then, 48 other American women have gone to space, but only one other Russian: Yelena V. Kondakova, in 1994.
http://www.nytimes.com/2012/07/24/science/space/sally-ride-t...