You need to read the plot of the game more carefully. When you choose the past in which you were a man, you don't have any perk options, if you choose the past of a woman, you can choose the perk you like best, this will be your main perk, and during the game there will be others depending on how you play . Pregnancy in the game is random, but all kinds of factors affect it, such as a woman's cycle that changes, ejaculation inside or outside, magic pills that will help you not get pregnant. There are also no condoms in the game, so be careful and consume alcohol correctly)