How to use pregnancy test paper Pregnancy test paper is a common tool used to detect pregnancy, and the method of use is relatively simple. First, you need to prepare a test strip, a clean white paper and a glass of water. Then, soak the test paper in clean water for 5-10 seconds, take it out and place it on white paper. After waiting for 5-10 minutes, observe the color change on the test paper. Things to note when using early pregnancy test strips