Quantitiative hcG tests

Hi all,

I've noticed in some postings that people get a "quantitative hcG"
test early in pregnancy to ensure that the hcG levels are rising and
doubling as expected, or it seems from some posts that it helps "age"
the fetus if conception date is not known. I only had a qualitative.

When I went to my dr., he basically said "stay healthy and we'll see
you at eight weeks". So are the quantitative hcG tests something
people are seeing as routine to other doctors, or are they primarily
given when m/c is feared? I am new to this whole process and want to
make sure I'm doing everything I should. Is this something people ask
for, and if so, when?

Any info appreciated.

Thanks,

Donna