Pregnancy can typically be detected as early as 6 to 10 days after conception with blood tests, and many at-home urine pregnancy tests can detect pregnancy around 10 days after conception or about 4 days before a missed period. Some ultrasensitive home pregnancy tests claim to detect pregnancy hormone (hCG) levels as early as 5 to 6 days before the expected period, though these early tests may sometimes give false negatives. For most reliable results, testing is recommended at the first day of a missed period, when hCG levels are high enough to be accurately detected by all pregnancy tests.