How early is the earliest day you can detect pregnancy with a pregnancy test? Pregnancy is a very important stage in life, but many women may wonder: \”Am I pregnant now?\” With modern technology, we can use pregnancy tests to detect whether we are pregnant, but the earliest days of pregnancy are Can I use a pregnancy test stick to detect it? The following is an introduction to you from four aspects. 1. The principle of pregnancy test stick First, we need to know the principle of pregnancy test stick. common