The Genar-Diversion (also known as Gener-Diversion) is an elixir that transforms the sex of a person from male to female or female to male. Their memories are altered so that they believe they were always of the sex that they changed into.
In 2119 A.D, the Agravity Boys crash landed on α-Jumbro. An entity known as the Higher Being appears before them and offers them the Genar-Diversion elixir. The Higher Being gives them 365 days to use the elixir, and only one person is allowed to use the elixir.  Baba, Geralt and Saga begin flirting with the feminine Chris, hoping that Chris will be turned into a woman.
Chris refuses and the rest of the boys begin fighting over how the elixir should be used. Geralt mentions that a single female is not enough to repopulate humanity and they decide not to use the elixir. Saga then throws out the elixir. Its current location is unknown.