About 3-4 days after the last pill.
You can start your birth control the Sunday after your period.
You start to ovulate and get your period back and you can get pregnant again.
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
No. Your period will stop as soon as the endometrial lining completely sheds. (Assuming that it is normal). However, if you take birth control your next "period" will probably be significantly lighter and shorter.
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.