Can the level of HCG in blood tell me whether my pregnancy is a healthy one or not?
Yes - but only to a certain extent. The HCG (human chorionic
gonadotropin) hormone is a remarkable molecule which is very unusual
because it is produced only by the cells that will become the placenta
of the developing embryo (trophoblast cells). Once the embryo implants
in the uterine lining, these cells start producing HCG. It takes a few
days for the HCG hormone to build up in the body to a level, which is
high enough for it be detected in the blood or urine of pregnant women.
Normally, you do your first pregnancy test (HCG blood test) 14 days
after embryo transfer.
At this point, if the embryo has implanted, you
will also get a positive urine pregnancy test. The HCG hormone level in
the blood doubles every 48-72 h. If the HCG level doubles well, this
indicates that the cells of the embryo are dividing well, suggesting
that the pregnancy is progressing normally and is healthy. This is why
monitoring the HCG blood levels during the first few weeks helps to make
sure that the pregnancy is advancing as expected. A drop in HCG level
during this time is a sign that the pregnancy is not healthy. Make sure
that you measure your HCG level in the same lab each time to avoid
discrepancy in the results.