The appearance of a white plate when testing with early pregnancy test paper 15 days after ovulation does not mean that there is no hope. Because 15 days after ovulation, the fertilized egg has just entered the uterine cavity and has just settled in the uterus, the HCG level in the body is still relatively low at this time, so it is often not detected by the early pregnancy test paper and a false negative result may occur. It is recommended not to drink too much water 2 hours before urine retention to avoid dilution of urine after drinking too much water, which can also lead to false negative results in clinical practice. If pregnancy is still not detected by urine HCG 20 days after intercourse, it is recommended that blood HCG be drawn, as blood HCG is more sensitive.