yes maybe
You can start your birth control the Sunday after your period.
Yes you can start birth control while on your period. Usually your doctor will tell you to start on a Sunday so it's easier to remember when you first started your pack.If you get your period on the Sunday you start you still start on birth control.
Yes; if you start birth control on the first day of your period, you'll have immediate protection.
There is no way to know when you will start your period when you first start taking Triphasal birth control. You just have to wait and see how your body reacts.
If you start the birth control pill on the day your period starts, you'll have immediate protection.
Sunday after your period
You should start your new pack of birth control pills on schedule, regardless of bleeding. If you want to start early, on the day your period ends, that's fine. Do not go more than seven days without taking an active birth control pill.
If you are not having sex/unprotected sex, you can start your birth control whenever you want.
You can start them whenever, but it is a possibility that your period will be delayed.
Period time disturbed
You should take birth control on schedule regardless of bleeding. Hormonal birth control can sometimes cause a missed period.
You should still get a period each month while on birth control. You will usually start your period during the week that you take your placebo pills, because they have no hormones in them. If you skip the placebo pills and start your active pills instead, this will delay your period.