How many days after intercourse during the ovulation period can pregnancy be detected?

Under normal circumstances, pregnancy can be detected approximately 7-10 days after ovulation intercourse via blood testing, while urine testing usually requires waiting about 10-14 days. The exact timing may vary depending on the testing method and individual differences. Detailed explanation is as follows:

From a physiological perspective, after the egg and sperm unite to form a fertilized egg, it takes about 6-7 days for the embryo to implant into the uterine lining. Only after implantation does the placenta begin to secrete human chorionic gonadotropin (hCG), which is the key indicator for determining pregnancy. Blood tests can detect even small increases in hCG levels earlier, providing higher accuracy 7-10 days after intercourse. Urine tests, however, require higher concentrations of hCG and are generally more reliable only after hCG levels have accumulated to a detectable level—usually 10-14 days after intercourse. Morning urine typically provides more accurate results for urine testing.

If testing is performed too early, even if pregnancy has occurred, a false-negative result may occur due to insufficient hCG levels. It is recommended to choose the appropriate testing method according to individual needs. Those wishing to confirm pregnancy earlier should prioritize blood testing.