Not only does a blood test detect hCG earlier, but it also detects the amount of hCG. If a blood test shows the presence of hCG, but the amount is very low, it could indicate an ectopic pregnancy.
An ectopic pregnancy forms outside the uterus and is a dangerous health issue that can be life-threatening. Blood tests can also indicate a potential miscarriage and accurately date the pregnancy.
However, blood pregnancy tests take longer to get the results, making them less attractive.