When to have sex with opk

Wondering when the best day to have sex is when tracking with opk? Some people say have sex every other day during fertile window, some say done have sex from day 10 and on until you notice an LH surge, and some people say have sex everyday. What day/days did you have sex when you successfully conceived? I tend to see an LH surge on day 16 and I’m wondering what days you’d recommend?