Share This. Archaeology and Anthropology. Archaeology and anthropology together encompass the study of humankind from the origins of the human species to the present day. Both disciplines have a long history: archaeology grew from 18th-century antiquarianism, while anthropology began even earlier in the first days of colonial encounter.
Regulating Your Cycle. Research has shown that a diet high in fiber and low in fat can cause an irregular menstrual cycle. In one study 210 women, between the ages of 17 and 22 years old, were asked to complete a questionnaire about their eating habits and their menstrual histories.
What Factors Can Delay It? If body fat levels fall to below 15 to 22 percent of total body weight, as can happen in a growth spurt, menarche and menstruation may be delayed. The relationship of body fat to menstruation also explains why female athletes often stop menstruating, or develop light or irregular periods.