Pregnancy tests are an essential tool for detecting pregnancy. They can be used to confirm a pregnancy or to rule out the possibility. Pregnancy tests work by detecting the presence of human chorionic gonadotropin (hCG) in the urine. hCG is a hormone that is produced by the placenta after implantation.
Pregnancy tests are available in a variety of formats, including over-the-counter tests, prescription tests, and blood tests. Over-the-counter tests are the most common type of pregnancy test. They are available at most pharmacies and grocery stores. Prescription tests are typically used when a woman is experiencing irregular periods or other factors that make it difficult to determine when ovulation occurred. Blood tests are the most accurate type of pregnancy test, but they are also the most expensive.