It stands for Big Fat Positive (when you get a positive pregnancy test). BFN is Big Fat Negative when you get a negative result. Under the General Message Board there's a topic at the top that lists all the abbreviations. I found it helpful when I first joined this site...you might find it helpful too!
ME 36, DH 49
TTC 10 years
5 Failed IUI's
1st IVF Feb 2006 - TWIN BOYS Tyler & Brady born 9/30/06