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.
There are three different ways to start taking birth control pills. First Day of Period Start: Start your pills on the first day of your period. Continue to take one pill every day at the same time. With this method, you do not need to use a backup method as the pills are effective in preventing pregnancy right away.