Retest of HCG level, only 1 vial?

Kimberly

Hi,

On Saturday they tested my HCG level and it was at 4,668 which they said is low for 5 weeks so they tested me again today to see if it doubled. My question is, on Saturday at the ER (I was worried I was having a miscarriage) they took 3 vials of my blood. Today they only took 1...is that normal?