How Do Pregnancy Tests Work

Pregnancy tests are used to detect the presence of a hormone called human chorionic gonadotropin (hCG) in a woman’s urine or blood. hCG is produced by the placenta after a fertilized egg has implanted in the uterus, and is a reliable indicator of pregnancy.

Most home pregnancy tests work by detecting hCG in a woman’s urine. These tests are simple to use and can be purchased over-the-counter at most drugstores. Here’s how a typical home pregnancy test works:

1. Collect a urine sample: Most home pregnancy tests come with a small cup or stick that you can use to collect a urine sample. You can also use a clean, dry cup to collect your urine and then dip the test stick into the cup.
2. Wait for the results: After collecting your urine sample, you’ll need to wait a few minutes for the test results to appear. The exact time may vary depending on the brand of test you’re using.
3. Interpret the results: If the test shows one line, it means the test is negative and you’re not pregnant. If the test shows two lines, it means the test is positive and you’re likely pregnant. Some tests use a plus or minus sign, or digital readout, to indicate the results.

It’s important to note that home pregnancy tests are not 100% accurate and can sometimes produce false negatives or false positives. Factors such as the timing of the test, the sensitivity of the test, and certain medications or medical conditions can impact the accuracy of the results. If you have concerns about your pregnancy test results or have other questions about pregnancy, it’s a good idea to consult with your healthcare provider.