The First Response Pregnancy test is designed to be able to give accurate readings after a relatively short amount of time. The makers claim that it can give a positive reading as early as five days BEFORE a missed period – which is incredible when you consider that most tests say you need to wait until ten days AFTER a missed period for accurate results. However, the promise made by First Response is a best case scenario.
You will get First Response pregnancy test false readings if you take a pregnancy test before the egg has actually implanted in the womb. This could happen early after the test is taken, but it may happen much later after the egg is fertilized.
If you are not trying to get pregnant then you are unlikely to notice the pregnancy until you miss a period, so a first response pregnancy test false negative is highly unlikely in that instance. However, if you are trying to get pregnant, and you are timing intercourse around ovulation, etc, then taking tests early and getting a negative result could be demoralizing for you.
You may want to try more than one test to see whether other tests give better results, or you could simply ignore urine testing entirely. Blood tests are far more accurate than urine tests, and will give results far more quickly than a urine test would.
Note that pregnancy tests can give false positives too, however these are relatively rare compare to false negatives. A false negative occurs if the test is not sensitive enough to pick up the levels of hormones in your urine (which is often the case with the first response test, especially when a woman has only just become pregnant. A false negative means that the test thinks the hormone is there when it is not.
A woman’s hCG levels more than double within the first few days of their pregnancy and continue to rise for a while afterwards. For a pregnancy test to erroneously say that a woman is pregnant would either mean that they have protein in their urine which should not be there, they have blood in their urine (both of these are signs of potentially serious health problems) or they are taking certain medications such as anticonvulsants which give false readings.
If you are taking prescription medications and think you might be pregnant, talk to a pharmacist before you take a pregnancy test so they can tell you which test will be the least likely to give you a false positive. If the test then comes back positive, talk to your doctor immediately to a)get a blood test done to confirm your results, and b)find out whether it is OK for you to continue taking your medication or whether you should change to something else. There are many medications which are not really intended for pregnant women to take, and you will need to make sure that your unborn child is kept safe.