I've been doing opks for 10 months roughly. I have always gotten a + lh surge around cd 13. I'm on cd 12 now and there isn't a secon…" /> I've been doing opks for 10 months roughly. I have always gotten a + lh surge around cd 13. I'm on cd 12 now and there isn't a secon…" /> I've been doing opks for 10 months roughly. I have always gotten a + lh surge around cd 13. I'm on cd 12 now and there isn't a secon…" />