I always thought these were totally reliable. I always buy the Answer brand because I get 20 sticks for a decent price. So, this month, I'm on a fertility drug, so I've had constant ultrasound monitoring as well as using OPKs.
This past Sunday, I received a positive on the OPK and that was a day I was also scheduled to have an ultrasound done. The nurse did my ultrasound, and said there was no way I could have gotten a positive because my largest follicle was only 15 mm. Okay. . .
So today I had another ultrasound, and my largest follicle as 24 mm, and I had a blood test done that confirmed an LH surge. I decided to test myself as well this afternoon, and although two lines came up on the test, one was definitely darker than the other, which is a negative.
I'm just wondering if I've had faulty results the entire time I've been TTC? I would have never known had I not been having ultrasound monitoring. I would have been BDing like crazy last Sunday, and would have completely missed my ovulation!
Has anyone else experienced something like this?