Here are brief descriptions of the changes you can chart to predict when you ovulate in order to plan or prevent pregnancy.
More complete descriptions follow.
Your temperature rises between 0.4 F and 0.8 F on the day of ovulation. It remains at that level until your next period. You must do so all through the first part of your menstrual cycle, until you are sure you have ovulated. Normally cloudy, tacky mucus will become clear and slippery in the few days before ovulation. It also will stretch between the fingers.