"The open circles or clear dots on your chart mean that you have entered something in your
data that may make those temperature points unreliable. In most cases it is
the time the temperature was taken or that you entered that you were sleep deprived.
Please refer to the Chart Legend for full details on all the symbols and annotations displayed on your chart."
Re: quick chart question
https://www.fertilityfriend.com/Faqs/Open-circles-on-chart.html
"The open circles or clear dots on your chart mean that you have entered something in your data that may make those temperature points unreliable. In most cases it is the time the temperature was taken or that you entered that you were sleep deprived.
Please refer to the Chart Legend for full details on all the symbols and annotations displayed on your chart."
Married Bio * BFP Charts