Allow women days where they can stay home because of the menstrual cycle

I am petitioning to allow women time to rest because of something very natural that happens to them, there are some girls that get cramps to a level that causes them to pass out. This would only be the right thing to do because they have a lot to deal with during that time of the month and its not too much to ask for time off. This could limit the amount of stress put on them during that time and allow them to preform at 100% capacity.