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.
If you are not taking 'the pill' then a hormone tablet called norethisterone can be prescribed. The dose is 5 mg three times a day starting 3-4 days before a period is due. It can be continued for up to two weeks or so until you want to have a period. Your period will then normally begin 2-3 days after stopping it.