Well, it depends on your spread and the pokemon you're catching. For my jolly spread, it reads 50% - F, 12.5% - F, 25% - F, 75% - F. Those percentages represent the percent chance a certain pokemon is female. So this means, if I am trying to catch a pokemon that has a 50% chance of being female (and male), it will be a female. If it has a 12.5% chance of being female (example: bulbasaur), then it will be female. If it has a 25% chance of being female (example: abra) then it will be female....etc, etc. Essentially, any pokemon I catch with that spread will be female. I'm not sure what yours reads, but it probably says F for the 50% column since that's what most pokemon's gender ratios are.