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.
Recognize the first day of your cycle. Understanding the days of your cycle empowers you to make decisions about your health and family planning. To begin determining the first day of your period and the length of your cycle, start by numbering the days of your cycle from the first day of your next period. Day one of your cycle occurs with the start of your period. Thus, mark your calendar with X on the day your period starts.