how is pregnancy detected in blood?
HCG is a hormone secreted in pregnancy and detectable by blood test about day 8 to 10 after conception. Whether you are taking a home pregnancy test that uses urine or a blood pregnancy test from your doctor or midwife, the results will be based on measurements of this hormone â be it in your urine or blood. However, a blood test is more sensitive and can offer more information than a home urine test.