Different brand pregnancy tests

[lordVoldemort]

So I had an embryo transfer done a couple weeks ago and given a pregnancy test to do today. I did the test the hospital gave me (brand was Alere) and there was the faintest line, you could barely see it. I then did a FRER and the line was so strong it was almost as dark as the control line. Does anyone understand why there would be such a difference between the two tests?

FRER are very sensitive, I think they detect the pregnancy hormone HCG at very low levels - 6mlu or something? Perhaps the other wasn’t as sensitive.

But congratulations!!

It will be the hog levels in the tests being so different, I think the average a frer picks up is 6.5hcg where as a clear blue is 20hcg.
Google hcg levels in various tests, as I've explained that terribly!

But

CONGRATULATIONS

Woah, congratulations!!
Is this your first pregnancy?

Thank you Yes this would be my first pregnancy, second embryo transfer, the first didn't work.