I think I have an idea but I honestly don't know for sure!
Also, I just triggered with pregnyl on Tuesday eve. and was wondering how long it stays in your system and when I can POAS without worrying about a false + from the HCG.
You got some good answers already but just wanted to reiterate that you should definitely change your screen name to something other than your email address.
Re: What is a chemical pregnancy?
Google says...