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| | Menstrual Cycle: An Overview |
 | | On average, menarche (a young woman's first menstrual period) occurs between the ages of 12 and 14 years old - generally two years after her breast budding, and, in most cases, not long after the onset of pubic hair and underarm hair. |
 | | For menstruating women, an average menstrual cycle lasts 28 days - starting with the first day of the last period (which, on average, lasts 6 days, with some women having a very light flow and others having a very heavy flow) and ending with the first day of the next menstrual period. |
 | | However, the length of women's cycles varies, particularly for the first one to two years after menarche (a young woman's first menstrual period). |
| www.chw.org /display/PPF/DocID/24302/router.asp (611 words) |
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