Those are good questions, because I am having the same ones. And additionally I have another one: What are the percentage chances to get pregnant during the different stages of your cycle?
1 in 5 while ovulating, 1 in 20 during the follicular stage (before ovulation), 1 in 35 during the luteal stage (after ovulation) and extremely rare while menstruating.
Body writing on your stomach that stays "fertile" doubles your chances and later there will be perks that also alter it.
