How long does it take for birth control to fully work?

Question

How long do I have to take birth control so it’s a 99% chance I won’t get pregnant and how long after sex with only birth control should I take plan b? And, am I able to get birth control without my parents with me?

Answer

Since no one else is saying it, don't take plan B if you're on birth control and you've waited long enough to be effective. It's unnecessary and way too much hormones for your body.

Answer

I take sprintec. they told me a week.

Answer

Ask your doctor. Some say a week and some say a month. Also the effectiveness depends on which method you have and how well you take it if it's a method that needs that kind of maintenance.

Answer

Each one is different. the pill that I was on was a month.

Answer

It depends on when you start it. If you start it on the first day of you’re period then it’s effective right away. Any other time, it takes seven days to be effective.