Octal - See also. 1  Computer numbering formats. 2  Octal games, a game numbering system used in combinatorial game theory. 3  Syllabic octal, a specific octal representation of 8-bit syllables.
Your doctor or nurse will suggest 1 of the following methods to begin taking the pill: Start your first pack of pills on the first day of your menstrual period. Use a backup method of birth control (such as condoms with spermicide) until you start the pill.
1 If your pack contains 21 pills, you will take one pill at the same time for 21 days and take a break from taking them for 7 days. 2  You can expect your period some time during the 7 hormone-free days. If you start the pill within the first 5 days of getting your period, you are protected from pregnancy right away. 2  If you start the pill 6 or more days after getting your period you are not protected from pregnancy until you have been using the pill for a full week.