Hey Alicat! I have PCOS and my FS told me to stop wasting money on them as they will always show a positive result or incorrect result due to the hormone it detects being present all the time with PCOS sufferers and same with temping that was never accurate either! But in saying that maybe temping could be more close to being accurate than anything else! I just wouldn't waste money on the OPK's hunny best of luck xoxo