Nationalism is the term historians used to characterize the modern sense of national political autonomy and self-determination from the late 18th century onwards. For example, German nationalism emerged as a reaction against Napoleonic control of Germany as the Confederation of the Rhine around 1805â14.
1 Work out the length of your average menstrual cycle. Day one is the first day of the menstrual period and the last day is the day before the next period begins.  Ovulation happens about two weeks before the next expected period. So if your average menstrual cycle is 28 days, you ovulate around day 14.
This is considered to be Day 1 of your menstral cycle. When you start your period again in about a month or so, mark that day off as Day 1 of your next cycle. Now that you have the first day of at least two menstrual cycles marked off, you can start counting the days in between. Starting from Day 1 of your first cycle, count all the way up to, but not including, Day 1 of your next cycle. The number you end up with is the length of your period.