You hear about
how pregnancy tests check for a pregancy hormone in your urine.
But have you ever wondered what exactly this hormone is, and
why it is only released during pregnancy?
Regardless of what
brand of home pregnancy test you take, the test checks for
the presence of the hCG hormone in the women's urine. So what
is hCG? It stands for human chorionic gonadotropin, which
is a glycoprotein hormone which is secreted by the placenta
shortly after fertilization. Now you know why everyone just
calls it the hCG hormone.
This hormone is
only present after conception, which makes it an ideal way
to check for pregnancy. It takes about 1-2 weeks for there
to be enough of the hormone present in the urine to produce
a positive test, which is why pregnany tests suggest waiting
until at least the day your period is due.