I know! Very confusing. I don't think I produce enough estrogen to get really good ferns or something. But the first two months I had some ferning exactly a day before a positive OPK. Kail, you should definitely look into it! Apparently they're very popular in Europe (isn't everything?) but its just a little microscope that you put saliva on every morning, and apparently the salt in your saliva produced by estrogen causes a "frosty" pattern on the lens. The rest of the month doesn't look like anything. Sounds kooky, but it works for lots of women. The estrogen surge happens right before your LH surge, so it gives you a few days in advance to start BD-ing prior to OPK's.