David’s Ovulation Test Strips, also known as ovulation test strips. To use it, you need to insert the ovulation test paper into the urine and observe the color contrast between the C zone and the T zone to speculate whether you are ovulating or not. Ovulation test paper can be used to know the ovulation period more accurately, if you usually have regular menstruation, you can start to use ovulation test paper from the fifth day after the menstruation stops. First, use a clean container to collect urine between 10 a.m. and 8 p.m. for testing. Tear off the outer packaging of the ovulation test paper, hold the handle end of the ovulation test paper and dip the end into the urine, do not exceed the max line, then place the test paper on the table, after ten minutes, you can observe the results. At the beginning of the test is a bar, that is, negative; gradually become a dark and light, indicating that the follicle has developed, ready to start ovulation. At this point, you can increase the frequency of the test, if the color of the test paper is getting darker and darker, when the two bars are almost the same color, it means that ovulation may be imminent. Ovulation test strips are not 100% accurate. If in doubt, seek medical advice from your OB/GYN.