Varies: The first period can last less than a day or off and on for a week. Then it may not recur for a month or many months. It takes a while for the cycles, to, regulate, usually up to a year.
Answered 8/9/2012
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Variable - may be: short. irregularity not uncommon. Menarche usually occurs between ages 11 & 13 in the US. However for some their period could start as early as age 9 & for others not until 16. Before you have a period, you will have noticed breast development, pubic hair & white to yellowish vaginal discharge. Before the first period a girl may feel bloated, develop cramps in legs or abdomen & feel moody .
Answered 11/8/2018
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