The earliest interval needed after the ovulation day is about 7~10 days before you can use the early pregnancy test paper to detect whether you are pregnant or not, but the result may be inaccurate.
In general, if a woman has the requirement to get pregnant, she can increase the number of coitus appropriately at the time of ovulation, which can improve the chances of conception. The day of ovulation is usually 14 days before the menstrual cycle, at this time of intercourse, the sperm and egg can combine to form a fertilized egg.
It takes about 7 to 10 days for the fertilized egg to secrete a small amount of human chorionic gonadotropin, also known as HCG for short, so blood and urine tests can be done at this time to determine if there is a pregnancy.
If the test time is too early, it may not be conducive to the accuracy of the results, you can delay the early pregnancy test time, the results will be more accurate.