I don't understand how sex can be safe through an entire pack of birth cont!
Question: I don't understand how sex can be safe through an entire pack of birth control pills?
Answers:
The bleed isn't a period, it's withdrawal bleeding from not having so much of the hormone in your system anymore. You're not fertile at all while on the pill because the hormones put your ovaries to sleep kinda, put them in suspension, so you never ovulate. Because you don't ovulate, you're fine for that spacer week.
No, they haven't left your system, and it's not enough time for your system to reboot and allow for you to become pregnant. It can take a few months to a few years for your hormones to balance out after quitting the pill.
hormonal birth control pills stop ovulation, meaning that an egg is not released, so you cannot get pregnant.