Analysis of information sources in references of the Wikipedia article "Nudity in film" in English language version.
... the use of body doubles, even for attractive stars, is common.
The base that houses the Fleet Academy is named 'Tereshkova' after Russian cosmonaut Valentina Tereshkova, the first woman in space. There are many more examples in the movie of the future being gender-neutral (meaning there is no bigotry based on gender), such as the mixed-shower scene and the female captain.