over the past 8 months, I would get a positive opk on CD16, like clockwork. on the past 2 cycles, (only 2 cycles with clomid), I never got a positive, even with testing multiple times a day.

last cycle my RE confirmed a surge with blood work and u/s but it still never showed as + on an opk. anyone else ever have this issue? this cycle my RE still scheduled my <a href="https://glowing.com/glow-fertility-program">IUI</a> for cd16 because my cycles are consistent. they indicated it's normal not to get +'s sometimes

thoughts?