Me! Ive been using this for years way before being married. High means you are either ovulating or will be ovulating in 24 - 36hrs. Usually after high, if you test 2 times per day during high period, itll show “peak”. That means your hormone is at peak and you are ovulating. Best to do the deed when it shows high and peak if youre planning to get pregnant. Itll only stay high for 2-3 days. Or sometimes next day already back to low.