I was wonder, I take my bbt at 4am, after 6 hours sleep. I have experimented by taking it at 7 instead. At 7 they come out much higher than at 4. My temps appear low, but I was wondering if this was just down to my early early temping time?
https://www.fertilityfriend.com/home/3f4fa6
https://www.fertilityfriend.com/home/3f4fa6