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How long on YAZ birth control is it fully effective against pregnancy? I have been on it for a month and half, was wondering when I can have sex.

Since YAZ is a combination birth control pill, meaning that it contains both estrogen and progestin, if you start taking it within five days after the start of your period, you are protected against pregnancy right away. If you start taking it at any other time during your menstrual cycle, you will be protected from pregnancy after seven days.

Remember that YAZ does not protect against sexually transmitted infections, so don’t forgot to use a condom or female condom to protect yourself from infection.

Tags: YAZ, the pill, birth control