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Old 02-20-2013, 11:48 AM   #3
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Join Date: Aug 2011
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I had the same question because I keep spotting before af. It seems the consensus is that the first day of actual flow is cd1. It really threw me for a loop this cycle though, because first day was only light bleeding and then went back to spotting, so I never actually felt like I had af. But apparently it was because it was the same number of days as usual, just shorter. Anyway, I'd count the 27th as cd1.

My iDevices are out to get me. Please excuse mistakes.
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