So, if you take birth control out of the equation, for each menstrual cycle, there is a window of opportunity that a person with a female reproductive system can conceive, which is a certain amount of days before ovulation, and like 48 (72?) hours after ovulation. So, if unprotected PIV sex happens anytime outside of this window, there's no chance of getting pregnant, correct? (Whether or not the female-bodied person can predict their cycle, when they're ovulating, etc., I'm just asking if, biologically, that's how it's "supposed" to work.)
Another question I have is if it's possible to ovulate while on your period? I know it's still possible to get pregnant if you have sex on your period, but I don't know if you can actually ovulate while on your period.
Thank you very much for any clarification you might be able to offer me :)