Amenorrhea causes, symptoms and treatment
Periods can often feel like an annoying fact of life that we could well do without, but in fact the existence of regular periods is an indication that the body is generally in good working order. Conversely, the absence of periods, amenorrhea, can be a signal that something is amiss. It is defined as either primary, when a girl does not start menstruating by the age of 15 or 16, or secondary, when a woman who has passed through puberty and had regular menstruation, misses three or more periods in a row.