1. Biochemical pregnancy means that the sperm and egg die just after the union, and you can only find out that you are pregnant, but you can't see the pregnancy sac.

2, blood HCG test to see, if the value is very low, it means biochemical pregnancy, after a few days will be natural bleeding. The test is weakly positive, now bleeding is not necessarily a biochemical pregnancy, you can intervals of 3 days to test again, if it becomes lighter that the biochemical pregnancy, if deepened to consider the aura of miscarriage. If the test becomes lighter, it will indicate a biochemical pregnancy, and if it becomes deeper, it will consider a miscarriage.