I have been using Wondfo OPKs that expired 2 years ago. I am getting negatives which makes me think they're unreliable HOWEVER some reasons I don't buy into the possibility they're faulty...1) 3 months ago I used them and got a strong positive 2) my OB said they were fine (I didn't tell her two years tho) and 3) I'm probably infertile and not ovulating and looking for something to blame it on.
What do you think? Would you trust 2 year expired OPKs?