The white plate on the 9th day of ovulation may not be biochemical, because at this time, if the urine test, may not be able to detect, until about 14 days after the day of ovulation, the fertilized egg will be able to secrete chorionic gonadotropin inside the uterine cavity, and the hormone level will be able to be detected in the woman’s urine. Therefore, if you find a white spot on the 9th day, it is best to go to the hospital for a blood test, because if you are pregnant, the chorionic gonadotropin in your body should be higher than normal, and if it is lower than normal, you are not pregnant. If you want to do your own urine test, it is best to do it after the 14th day of ovulation and the first urine in the morning is more accurate.