Whether you’re trying to conceive or scared about that ill advised one-night stand you’ve to take the pregnancy test to figure out the way ahead. To get an accurate result it’s imperative to understand how the test works. A pregnancy test works by detecting the human chorionic gonadotropin (HCG) levels in your urine. A woman’s body starts producing HCG when a fertilised egg implants in her uterus. This is why for the most accurate seven days after a missed period. Most home pregnancy tests aren’t sensitive enough to detect it within a day or two due to low HCG levels. Watch Dr Eden Fromberg explain how the pregnancy test works and how to take it properly.