Why is there a faint line on the FRER but not on the clear blue?

Question

I’m 9 DPO any advice does it take different HCG levels? I’ve had the faint line on the FRER since last night with every test I took and it is getting darker very slowly.

I’ve taken 2 different tests at different times of the day. The FRER has a really faint line where the clear blue has nothing. Any reason why!?

Answer

I don’t see a line on either tests

Answer

This is what my tests looked like at 9DPO. Barely anything on CB and a clear positive on FR.

Answer

I see a line on all three

Answer

This is how my line looked at 9 DPO on FRER

Why is there a faint line on the FRER but not on the clear blue?

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