Community post

If u have regular cycle you could start at cd 8-9
Test at 10am not fmu and no liquid for two hours prior.
Once test shows getting darker test at
10am 2pm
Once they dark add a 6pm test
X

It depends on how long your cycle is. If you have a "normal" cycle, you'd ovulate around CD14, so you'd want to start testing a couple days before then to catch your surge.
My OPKs were only accurate in the afternoon, and it changes from woman to woman. If you'd like to figure out what's normal for you, you should take one in the morning and one in the evening to get a better idea about when your surge is.