There are two types of pregnancy tests: urine and blood. Both test for the hormone called human chorionic gonadotropin (hCG), which you start producing after implantation. But only one test expires.

A pregnancy test works by detecting a hormone called hCG in your urine. Over time, the chemicals in the test can lose their ...

You've just taken a pregnancy test but can you trust the result? A Family Planning expert sets the record straight. Home pregnancy tests work by detecting the hormone produced during pregnancy (Human ...