Ovulation test paper a deep and light after a day only a red line, may be the end of ovulation, ovulation test paper failure and other reasons, during which you can go to the hospital to check the ultrasound, arrange for cohabitation. The first thing that you need to do is to get a good deal of money to pay for the services of the company, and then you can get a good deal of money to pay for the services of the company. The only red line on the ovulation test paper after one day may also be the second test error, ovulation test paper test also exists invalid results, you can again according to the correct method of testing once, and then clear results. If you’re not sure whether your ovaries are ovulating or not, you can go to the hospital for an ultrasound to determine whether the follicles are being discharged, and then you can arrange to have sex with your partner to see if you can get pregnant. The accuracy of ovulation test paper to monitor ovulation is not 100%, not excluding the possibility of error.