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.
The pill is most effective against pregnancy this way. Iâve read that if you start the pill up to 5 days after the start of your period, you are protected immediately (hereâs one source: http://www.plannedparenthood.org/health-topics/birth-control/birth-control-pill-4228.htm ). I probably would wait 7 days to make absolutely sure, but just saying.