But the male cosmonauts slowly started changing their tune when the women got into training. The female candidates demonstrated equivalent aptitude for the job as the men, earning their respect as they went through tests in the centrifuge and altitude chamber. In some cases outperforming the men; Tereshkova emerged from a long-duration isolation test in better spirits than some of her male counterparts had.
There was an unmistakable change in attitude of some men, too, as they started to see the women as attractive women. As relative veterans, the men would offer the women advice during particularly complex or difficult tests. Cosmonaut Andrian Nikolayev, the pilot of Vostok 3, was often seen in the test area while Tereshkova was in training. They eventually married and their daughter, Elena Andrianovna Nikolaeva-Tereshkova, was the first person born to two people who had been in space.
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While the women were training and vying for the prized spot on Vostok 6, the whole Soviet spaceflight program was changing. The Vostok spacecraft was quickly reaching its technical limits, threatening to become obsolete. Chief Designer Sergei Korolev was pushing to launch the new Soyuz spacecraft, the one that would could rendezvous, docking, and eventually make circumlunar flights, but the program was falling behind.