OvaGraph is in the process of being retired as of December 1, 2025 due to resource constraints. To allow those who missed the initial cutoff to download their data, we are temporarily re-opening the OvaGraph website on the morning of Friday December 5th and will be shutting down OvaGraph permanently on the morning of Tuesday December 9th.

Please use this second, final window to download your cycles to your computer, and do not upload any additional data.

Additionally, we have launched a new Fertility Awareness Method charting app called Cyclisity that is available now on iPhones, in the US and Canada, for Fahrenheit. We are working to launch Cyclisity on Android, outside the US and Canada, and in Celsius in the coming months.

For instructions on how to download your OvaGraph data to your computer and also upload it to Cyclisity if you so choose, please email support@cyclisity.com and we will provide instructions.

Thank you for your patience and understanding during this transition.

Sincerely, Sabrina, Max, Toni and the entire Cyclisity team

How much does my BBT need to rise to signal that I have ovulated?

A general rule of thumb in BBT charting is to look for a temperature shift of at least 0.4 degrees Fahrenheit from one day to the next as a sign that ovulation has occurred. Then, watch for your BBT to remain elevated for the next 3 out of 4 days to confirm that the temperature shift is sustained and that you are now in your luteal phase. Because some poeple have a more subtle temperature shift, you can also look for a temperature shift of at least 0.2 degrees Fahrenheit above the highest temperature in the previous 6 days, and sustained elevated temperatures for the next 3 out of 4 days.

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BBT Charting

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