How common is it for HCG not to make it in to a woman's urine? I've heard that some women can't get positive urine tests and need to do a blood test. Why is this? & How common is it?
It depends when you concieve because the further into your pregnancy you are the more HCG there is. At 18 days after conception there is a 1% chance that it wouldnt pick up the HCG. Go to your doctor thats what im doing! I dont trust them!
