Yes, it is important to know that while doing a urine test, the result will be positive when there is hCG present in it. The presence of hCG is an indication of pregnancy. The same hormone is tested in the blood test. However, if the blood test shows a very low amount of hCG, it could be due to ectopic pregnancy, that is, when the pregnancy happens outside the uterus. In such cases, the baby does not develop and it needs to be operated on.