yes - i had been using first response for a few months, and it was very easy to see and interpret. but on my 3rd month they were sold out of FR, so i bought the digital CBE. started testing on day 10, per my Dr.'s instructions, and got a happy face right away. i was so annoyed. i had a few extra FR's so i tested the next day multiple times with both brands. the CBE kept saying NEGATIVE over-and-over, while the FR gradually got darker. my nurse practitioner said i MAY have been "spilling LH" for some reason that 1st day. but she also told me she had another patient who had problems with the CBE. so i am definitely sticking to the first response from now on!
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