Sleeping with a heated blanket could affect Ava's skin temperature reading as the heated blanket directly covers your entire body and could interfere with the Ava tracking the natural fluctuations in your skin temperature during sleep. As your skin temperature patterns play a role in the algorithm's predictions for your fertile window and ovulation, you should be aware that using a heated blanket while sleeping could have an impact on your skin temperature readings and hence on your Ava's predictions' accuracy. On the other hand, we tested Ava in a very wide variety of temperature conditions and room temperature didn't have much of an impact on the data. It's possible that extremes could have an impact but we haven't seen any evidence of that in our testing.