Asking for a friend...
She is 3 days late for af (last LMP was 11/1, she thinks she ovulated around 27th or 28th), she bought a pack of 3 FRER yesterday and did 1 yesterday arv, 1 this morning with FMU and 1 this arv.
The first 2 tests were completely negative, not even a hint of a 2nd line. The 3rd she did this arv has a line where the test line should be. It was noticable almost immediately (well within time frame), although very faint. She showed me and I honestly cant tell if its very faint pink or an evap line.
What are the chances of only 1 test out of a box of 3 showing an evap while the other 2 don't.