What is an ovulation test paper? An ovulation test paper is a test tool used to measure progesterone levels in women to help determine their ovulation period. Its use is very simple, just dip the test paper into the urine, and then judge the ovulation period based on the color change. Ovulation test strips are very convenient to use and have high accuracy, so they are welcomed by many women. How to use ovulation test strips correctly? First, you must understand your menstrual cycle. For women with regular menstrual cycles,