Urine home pregnancy tests or blood tests at the doctor’s office are used to detect the pregnancy hormone hCG (human chorionic gonadotropin) that is produced after a fertilised egg is attached to the wall of the uterus.
You can have blood tests done at your doctor’s office, but know that it will take long and that the long wait can drive you crazy.
You get two types of blood pregnancy tests – a qualitative or quantitative hCG test.
A qualitative hCG blood pregnancy test only detects IF the hormone is present and simply tells you whether you are pregnant or not. This picks up levels as low as 10mIU/L (milli-International Unit per millilitre).
The quantitative hCG blood pregnancy test goes much further: it can tell exactly how much hCG is in your blood – it picks up even extremely low levels of hCG. This way of measuring hCG can also be used later to detect problems.
However, more often than not, doctors refuse to perform blood tests before you’ve missed your period. Home pregnancy tests, however, can sometimes pick up pregnancy as early as seven days after ovulation and new ones can pick up levels as low as 5mIU/L.