Q: Which factors other than fertility affect the BBT?


A: Several factors other than fertility can affect the BBT. These factors include:

  • Using a new thermometer in the same cycle.
  • Emotional excitement. 
  • Sex shortly before taking the temperature.
  • If you have a fever. 
  • Drinking alcohol the previous night. 
  • Taking BBT after less than 3 hours of consecutive sleep. 
  • Taking BBT at a different time. 
  • Using a heating pad or electric blanket.