Detailed explanation of how to use the pregnancy test stick. As a very convenient pregnancy detection tool, the pregnancy test stick is also very simple to use. The following will introduce in detail what a pregnancy test is, how to buy it, how to use it, and how to read the results. 1. What is a pregnancy test? A pregnancy test is a professional tool that detects the concentration of human chorionic gonadotropin (hCG) in urine to determine whether you are pregnant. It is a small, portable tool commonly used for home self-testing. 2. How to buy a pregnancy test stick? There are many brands of pregnancy test sticks on the market, but the specific usage methods are similar. When purchasing, you should choose formal channels to purchase