10/31/2014 09:57 am ET

What To Do When Your Daughter Gets Her Period

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Stay calm.

If you’re the parent of a girl, inevitably, at some point she will emerge from the bathroom or come home from school and inform you, in some probably unexpected fashion, that her menstrual cycle has begun. It’s highly unlikely that she will use that particular genteel phrase, but whatever she says and no matter her age, Dr. Louise Greenspan, a co-author of “The New Puberty: How to Navigate Early Development in Today’s Girls,” says parents need to normalize it. “React in a calm way. Internally you may be freaking out that your 4th grader has her period, but externally you need to be calm.”

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