Following a few months of ttc after a mmc, I decided to start using opks and got the premom app and lh tests. Premom said to start testing lh immediately after your period to establish a baseline. I took a test this morning with fmu and scanned it - the reading is 87 and the line is already pretty dark! My understanding is lh should be at its lowest post period and the line should be almost invisible or around 0.25 on the readings. Has anyone else had similar?? If so did you ever establish a cause?