Ava chart confusion??? Please Help

Question

So I have only been using Ava for about 1 cycle and so far all of the charts are similar to where they were before AF started last cycle, except HRV which is double what it was at the beginning last time. 
Does this mean anything? I’m not particularly stressed or sick. Is an increase in HRV a sign of pregnancy? I thought it just measures stress?

Answer

This is my 3rd cycle with Ava and every cycle right before AF arrives my HRV ratio elevates and it’s generally elevated through my whole luteal phase. I honestly don’t follow that factor and took it off my dash board.