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.
Starting on the first day of your cycle increases the protection level since the hormonal effect starts at the very beginning of the cycle. And if taken correctly will start to protect you from pregnancy right after the first week of taking them. Therefore, the sooner you start the sooner birth control pills work.