Ovulation test strips are used to test whether the body is ovulating or not. The principle of the test is to reflect whether ovulation is normal by testing the level of luteinizing hormone (LH) in the urine. In contrast, the test for early pregnancy requires testing the concentration of chorionic gonadotropin in the urine, and the two tests are different. Women with regular menstruation can use ovulation test strips to test their ovulation time, starting from the 12th day of their menstrual cycle. Ultrasound monitoring of follicles can effectively see the whole process of follicle development and ovulation. If you have a red line, it means you are not pregnant, but two red lines mean you are pregnant. Therefore, from the above aspects ovulation test paper can not be used to test for early pregnancy, they not only test on different principles, but also test for different time periods. Women should choose the right one according to their needs, and the two should not be confused.