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.
(Check with your health care provider if youâre not sure which kind of pill youâre taking.) So thereâs no need to ever wait for the first day of your period to start taking birth control pills â you can start whenever you like! At the longest, youâll only have to wait seven days for the pills to start being effective.