Different hCG results from different labs?

Wondering if anyone had their early hCG blood work done at different labs?

I only had a 53% raise over two days (the ones prior to this most recent were a 96% rise and 67% rise) but this most recent test was done at a different lab (one sent out the blood work and one was done in house at our fertility clinic.) My doctor said it’s possible that the different labs could be a reason why it’s not higher.

We are waiting 4 more days and then testing again (at the same lab as the most recent test) so hoping for at LEAST 3x higher. Ugh it is so excruciating waiting to know if this is viable!