How Does a First Response Pregnancy Test Work?
A first response pregnancy test is a rapid, at-home test that can detect the presence of human chorionic gonadotropin (hCG) in urine. hCG is a hormone that is produced by the placenta after implantation of a fertilized egg. The test works by using antibodies that bind to hCG and produce a visible line on the test strip.
How to Use a First Response Pregnancy Test
First response pregnancy tests are easy to use. Simply follow these steps:
- Collect a urine sample in a clean container.
- Remove the test strip from the foil pouch and dip it into the urine sample for 5 seconds.
- Wait 1 minute for the results to appear.
Interpreting the Results
The results of a first response pregnancy test are easy to interpret. If the test line is as dark as or darker than the control line, the test is positive and you are pregnant. If the test line is lighter than the control line, the test is negative and you are not pregnant.
Accuracy of First Response Pregnancy Tests
First response pregnancy tests are very accurate. They are able to detect hCG levels as low as 6.3 mIU/mL, which is the same level of hCG that is detected by a blood test. This means that first response pregnancy tests can detect pregnancy as early as 6 days before your missed period.
Factors That Can Affect the Accuracy of First Response Pregnancy Tests
There are a few factors that can affect the accuracy of first response pregnancy tests, including:
- The time of day you take the test. hCG levels are highest in the morning, so it is best to take the test first thing in the morning.
- The amount of urine you use. Using too little urine can make it difficult for the test to detect hCG.
- The expiration date of the test. Expired tests may not be accurate.
What to Do if You Get a Positive Result
If you get a positive result on a first response pregnancy test, it is important to see your doctor to confirm the pregnancy and rule out any other medical conditions. Your doctor may also recommend a blood test to measure your hCG levels and track the progress of your pregnancy.
What to Do if You Get a Negative Result
If you get a negative result on a first response pregnancy test, it is possible that you are not pregnant or that you are pregnant but the hCG levels are not yet high enough to be detected. If you are still concerned about being pregnant, you should see your doctor for a blood test.
Conclusion
First response pregnancy tests are a convenient and accurate way to test for pregnancy at home. They are easy to use and can detect pregnancy as early as 6 days before your missed period. If you get a positive result on a first response pregnancy test, it is important to see your doctor to confirm the pregnancy and rule out any other medical conditions.