Gender Toggle: Changes the sim's gender flag.Infertility Toggle: Sims who are infertile can't become pregnant/impregnate others, even if their partner is an alien.Similarly, if your sim can impregnate others, turning this on makes it so they can impregnate other sims regardless of the other sim's settings. Alien Toggle: If your sim can pregnant, turning this on makes it so they can be impregnated by any sims regardless of the other sim's settings.
This mod comes with the following options for controlling how your sims' gender and sex is expressed in game mechanics: Reproductive capabilities configurer (V2.03):