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Fortnight. A fortnight is a unit of time equal to 14 days (two weeks ). The word derives from the Old English term fēowertīene niht, meaning " fourteen nights " (or "fourteen days", since the Anglo-Saxons counted by nights). [1] [2]
Irregular cycles or periods. Irregular cycles or irregular periods is an abnormal variation in length of menstrual cycles. An individual usually experiences cycle length variations of up to eight days between the shortest and longest cycle lengths. Lengths ranging between eight and 20 days are considered moderately irregular. [6]
Fad. A fad, trend, or craze is any form of collective behavior that develops within a culture, a generation or social group in which a group of people enthusiastically follow an impulse for a short time period. Fads are objects or behaviors that achieve short-lived popularity but fade away. [1]
The menstrual cycle is a series of natural changes in hormone production and the structures of the uterus and ovaries of the female reproductive system that makes pregnancy possible. The ovarian cycle controls the production and release of eggs and the cyclic release of estrogen and progesterone. The uterine cycle governs the preparation and ...
The term viral pertains to a video, image, or written content spreading to numerous online users within a short time period. If something goes viral, many people discuss it. Accordingly, Tony D. Sampson defines viral phenomena as spreadable accumulations of events, objects, and affects that are overall content built up by popular discourses ...
Menstruation. Diagram illustrating how the uterus lining builds up and breaks down during the menstrual cycle. Menstruation (also known as a period, among other colloquial terms) is the regular discharge of blood and mucosal tissue from the inner lining of the uterus through the vagina. The menstrual cycle is characterized by the rise and fall ...
Photoperiodism is the physiological reaction of organisms to the length of light or a dark period. It occurs in plants and animals. Plant photoperiodism can also be defined as the developmental responses of plants to the relative lengths of light and dark periods. They are classified under three groups according to the photoperiods: short-day ...
t. e. In historiography, periodization is the process or study of categorizing the past into discrete, quantified, and named blocks of time for the purpose of study or analysis. [1] [2] This is usually done in order to understand current and historical processes, and the causality that might have linked those events.