/jp/ - Otaku Culture

>>37416390
Assuming that Patchy has been having sex every day multiple times a day, so that there's always sperm swimming around in her womb and vagina, and assuming that Patchy has a menstrual cycle of 30 days, we can assume that her yearly number of fertile days is 72.
The odds of her getting pregnant on one of those days, generously assuming that the pill is 99.9% effective, is still quite low. Therefore we can't conclude whether Patchy is fertile or not based only on this evidence.

Though that's with the usual kind of use and she has been popping them like candy every time she has sex.