Very interesting. Thanks for posting. But this makes me paranoid!!! I thought AF was coming now I am thinking I am still in with a chance for this month....
If this link won't work for you, just key in "Babymed.com" into your search engine and choose the heading "Pregnancy Symptoms" on the left hand side of the home page.
You'll be able to read the article that way. It's very informative to say the least.