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length varies between 32-42 days, too long?

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I have been tracking the length of my menstrual cycles each month and I've noticed the length varies between 32-42 days. I know the average length is 28 days, but mines has always been a bit longer. I'm wondering if the length is too long and is considered "irregular"?
Since my cycle length is not the same every month, I find it difficult to predict when the next cycle will start.

Here are the lengths of my last 5 cycles:
Dec 31 - Feb 11 = 42 days
Nov 20 - Dec 30 = 40 days
Oct 11 - Nov 19 = 39 days
Sept 8 - Oct 10 = 32 days
Aug 7 - Sept 8 = 32 days

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replied February 16th, 2011
Menstruation Answer A19680
Welcome to ehealthforum.
Your periods do seem to be irregular. Is the bleeding flow and duration similar in each cycle? If yes, then it can be said that you are having irregular cycle. There could also anovulatory cycles involved (menstrual cycles without periodic egg release from ovary). Consider visiting a gynecologist to look for any abnormalities in hormonal levels, uterine or ovarian related problems that could be responsible for the change in your menstrual cycles.
Take care.

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