Just found this

Kelly • Kidney and pancreas transplant recipient pregnant with baby 2

So I was curious as this time around on almost every test I use the FMU shows bfn or so faint it’s hard to tell. But, SMU is darker colored and I get better lines.

So, I am adding this for those who have a curious mind like myself, I’d think as long as you don’t get up, go and then drink a gallon of liquid his could hold true