Pregnancy results

I sent off milk samples to central star to do pregnancy testing on 2 of my does. One doe bred 30 days prior came back pregnant (0.27) the other doe bred 31 days prior came back recheck (0.20). Apparently anything over 0.25 is pregnant. Between 0.1 and 0.25 is recheck and below 0.1 is open. I will recheck her but was just curious what her chances are. I know a recheck value can sometimes be caused by an early lost pregnancy. So the number was high but is dropping. Or it could just be this doe hasn't produced enough of the protein or whatever they look for yet. Just curious if anybody thinks it's more likely one than the other. I did just purchase them and they traveled 17 days after breeding so it is possible she lost it then. So, again, I will send in a new sample but in the meantime I thought I'd see of anybody has any thoughts. Thanks!