How important is it to use FMU?

Question

AF is a few days late and I went ahead and just took a test (10:30pm). It was 100% negative. 
Could FMU actually make a difference and show a positive tomorrow morning?

Answer

They say to use FMU because it is less diluted, as you normally aren’t up drinking water throughout the night. If you want to test during the day, try and do a 4 hour pee hold and not drink a lot of water during that hold in order not to dilute your pee prior to testing.

Answer

Following. I was just about to ask the same thing, mine was a negative too🤔

How important is it to use FMU?

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