Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Positive OPKs, Completely Negative Ferning

I have been using the Ovulite going on 5 months now. Not once has it shown me partial ferning or full ferning leading up to ovulation or during it. Even though I have had temperature shifts while BBT'ing, cervical mucus changes, and positive OPKs, and High/Peak readings on my Clearblue Easy Fertility monitor(high reading signifies estrogen surge, peak reading: LH surge). I have followed the directions very closely and still no ferning. Maybe I am just one of the few it doesn't work for, but it was certianly a waste of money for me.