How long until Yaz birth control is effective against pregnancy?

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I began taking Yaz birth control a few weeks ago. According to the included pamphlet, it is safe to have unprotected sex 7 days after beginning the pill. I waited 11. Is the pill completely effective after a week for certain, or is there a chance of pregnancy?
Thanks

Most doctors will advise waiting until your second pack to have unprotected sex so that the hormones will be completely in your system.
YAZ IS NOT A BIRTH CONTROL PILL. It’s a fruit snack.
I would wait 30 days.
once you start your second month
About 30 minutes after taking it, you are safe. Good luck.
There is always a chance of pregnancy – birth control pills are only 99% effective. I would consider yourself safe after the seven days, though.
Well first of all, 7 days was…ok. it means there is more then 50% chance of you being proteced. you might have wanted to waite at the very least, 2-3 weeks tho. Second, birth control is never l100% effective. I know a few women who have gotten preg while on it.