A blood test can detect pregnancy as early as 6 to 8 days after conception, which is earlier than urine tests that typically detect pregnancy around 10 days after conception or after a missed period

. More specifically, a doctor's blood test can usually detect pregnancy about 10 days after ovulation, which is roughly a few days earlier than most home urine tests

. There are two main types of blood pregnancy tests:

• Quantitative blood test (beta hCG test): Measures the exact amount of hCG hormone in the blood and can detect very low levels, making it very accurate and able to confirm pregnancy earlier

• Qualitative blood test: Simply detects the presence or absence of hCG and provides a yes/no answer, similar in accuracy to urine tests

Blood tests are done by drawing blood from a vein and sending it to a lab, with results usually available within hours to a couple of days

. Because blood tests detect hCG earlier and at lower levels, they are preferred when early confirmation of pregnancy is needed, such as in fertility treatments or when medical procedures require knowledge of pregnancy status

. In summary, a blood pregnancy test can reliably detect pregnancy about 6 to 10 days after conception or ovulation, making it the earliest method to confirm pregnancy