Femen leader Anna Hutsol has posted an artistic video on YouTube entitled Women Spring Is Coming.
It's age-restricted, but can't be described as pornographic.
In the video, another Femen leader, Inna Shevchenko, declares that she and her colleagues in the international feminist group are in a war for civil rights.
She implores viewers to help her group allow women to hear their "scream of freedom".
Femen was founded in Ukraine in 2008 and has focused a great deal of attention on Russian president Vladimir Putin's antigay legislation.
The group also opposes the Catholic Church's stance on same-sex marriage and patriarchy in all of its manifestations.