Re: How long do you have to be on the birth control before you can have sex?
The instructions that you got with your pills should explain everything. Most pills are started in one of two ways: Sunday start or Day 1 start. With the Sunday start, you start the pill on the first Sunday after your period starts. With this method, you have to use a backup method of birth control (condoms, spermicide, etc.) for the first seven days of the first pack of pills. After that, you're protected from pregnancy provided that you took those first seven pills correctly and on time, and that you continue to take them correctly and on time. With the Day 1 start method, you start the pill on the first day of your period and you're protected from pregnancy right away and no backup method is necessary as long as you take your pills every day and on time. Some people prefer to use condoms for the entire first month with either method. Again, this is not necessary (unless, of course, there is some risk of STD's), and more of a personal choice.